Geography

Tropical and temperate cyclones

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The atmospheric disturbances which involve a closed circulation about a low pressure centre,
anticlockwise in the northern atmosphere and clockwise in the southern hemisphere are called
cyclones. They fall into the following two broad categories: (a) Extra-tropical or Temperate and (b) tropical cyclones.

(a) Temperate Cyclones
Temperate cyclones are formed along a front in mid-latitudes between 35° and 65° N and S. They blow from west to east and are more pronounced in winter season.Temperate cyclones are mainly observed in Atlantic Ocean and North West Europe . They are generally extensive having a thickness of 9 to 11 kilometers and with 1040-1920 km short and long diametres respectively. Each such cyclone alternates with a high pressure anticyclone. The weather associated with the cyclone is drizzling rain and of cloudy nature for number of days. The anticyclone weather is sunny, calm and of cold waves.
(b) Tropical Cyclones
Tropical cyclones are formed along the zone of confluence of north-east and south-east trade winds. This zone is known as the Inter Tropical Convergence Zone (ITCZ). Cyclones generally occur in Mexico, South-Western and North Pacific Ocean, North Indian Ocean and South Pacific Ocean. These cyclones differ from temperate cyclones in many ways. There are no clear warm and cold
fronts as temperature seldom differs in Inter Tropical Convergence Zone. They do not have well-defined pattern of winds and are energised by convectional currents within them. Generally, these are shallow depressions and the velocity of winds is weak. These are not accompanied by anticyclones. The arrangement of isobars is almost circular. These are not extensive and have the diametres of 160-640km. However, a few of them become very violent and cause destruction in the regions of their influence. They are called hurricanes in the Carribean Sea, typhoons in the China, Japan and phillipines,

 

 

 

 

 

 Evaporation and Condensation: dew, frost, fog, mist and cloud, rainfall types

 Evaporation 

 

Evaporation is the process of which water changes from its liquid state to gaseous form. This process takes place at all places, at all times and at all temperatures except at dew point or when the air is saturated. The rate of evaporation is affected by several factors. Important among them are as under:
(i) Accessibility of water bodies :-The rate of evaporation is higher over the oceans than on the continents.
(ii) Temperature :-when the temperature of an air is high, it is capable of holding more moisture in its body than at a low temperature. It is because of this that the rate of evaporation is more in summers than in winters. That is why wet clothes dry faster in summers than in winters.
(iii) Air moisture :-If the relative humidity of a sample of air is high, it is capable of holding less moisture. On the other hand if the relative humidity is less, it can take more moisture. Hence, the rate of evaporation will be high. Aridity or dryness of the air also increases the rate of evaporation. During rainy days, wet clothes take more time to dry owing to the high percentage of moisture content in the air, than on dry days.
(iv) Wind :-If there is no wind, the air which overlies a water surface will get saturated through evaporation. This evaporation will cease once saturation point is reached. However, if there is wind, it will blow that saturated or nearly saturated air away from the evaporating surface and replace it with air of lower humidity. This allows evaporation to continue as long as the wind keep blowing saturated air away and bring drier air.
(v) Cloud cover :-The cloud cover prevents solar radiation and thus influences the air temperatures at a place. This way, it indirectly controls the process of evaporation.

Condensation

Condensation the process by which water vapor (gas) in the atmosphere turns into water (liquid state). It is the opposite of evaporation. This stage is very important because it is the cloud formation stage. Cool temperatures are essential for condensation to happen, because as long as the temperature in the atmosphere is high, it can hold the water vapor and delay condensation.

When a gas is cooled sufficiently or, in many cases, when the pressure on the gas is increased sufficiently, the forces of attraction between molecules prevent them from moving apart, and the gas condenses to either a liquid or a solid.

  • Example: Water vapor condenses and forms liquid water (sweat) on the outside of a cold glass or can.
  • Example: Liquid carbon dioxide forms at the high pressure inside a CO2 fire extinguisher.

The temperature of the air falls in two ways. Firstly, cooling occurs around very small particles of freely floating air when it comes in contact with some colder object. Secondly, loss in air temperature takes place on a massive scale due to rising of air to higher altitudes. The condensation takes place around the smoke, salt and dust particles which attract water vapour to condense around them. They are called hygroscopic nuclei. When the relative humidity of an air is high, a slight cooling is required to bring the temperature down below dew point. But when the relative humidity is low and the temperature of the air is high, a lot of cooling of the air will be necessary to bring the temperature down below dew point. Thus, condensation is directly related to the relative humidity and the rate of cooling.

here are four types of condensation and the worst period for such problems is September to May:-

  1. Surface condensation. This is the most familiar type of condensation, taking the form of water on window panes, cold wall surfaces and tiles.
  2. Interstitial condensation. This is condensation forming between walls or within the building structure.
  3. Reverse condensation. This is also called “Summer condensation”. If rains drenches a wall and strong sunlight then dries it, the heat can actually force water vapour into the wall. When it then meets an insulated surface, it forms condensation at that barrier.
  4. Radiation condensation. This is sometimes called “clear night condensation“. If there is a sudden temperature drop at night, it can cause condensation on the underside of roof coverings, for example: often this drips onto the insulation quilting and causes a distinctive mottled effect upon the quilting.

 

Dew, Frost, Fog, Mist and Cloud

Dew: When the atmospheric moisture is condensed and deposited in the form of water droplets on cooler surface of solid objects such as grass blades, leaves of plants and trees and stones, it is termed as dew. Condensation in dew form occurs when there is clear sky, little or no wind, high relative humidity and cold long nights. These conditions lead to greater terrestrial radiation and the solid objects become cold enough to bring the temperature of air down below dew point. In this process the extra moisture of the air gets deposited on these objects. Dew is formed when dew point is above freezing point. Dew formation can be seen if the water is poured into a glass from the bottle kept in a refrigerator. The outer cold surface of the glass brings the temperature of the air in contact with the surface down below dew point and extra moisture gets deposited on the outer wall of the glass.
Frost: When the dew point is below freezing point, under above mentioned conditions, the condensation of extra moisture takes place in the form of very minute particles of ice crystals. It is called frost. In this process, the air moisture condenses directly in the form of tiny crystal of ice. This form of condensation is disastrous for standing crops such as potato, peas, pulses, grams, etc. It also creates problems for road transport system.
Mist and Fog: When condensation takes place in the air near the earth’s surface in the form of tiny droplets of water hanging and floating in the air, it is called mist. In mist the visibility is more than one kilometer and less than two kilometers. But when the visibility is reduced to less than one kilometer, it is called fog. Ideal conditions for the formation of mist and fog are clear sky, calm and cold winter nights.
Cloud: Clouds are visible aggregates of water droplets, ice particles, or a mixture of both along with varying amounts of dust particles. A typical cloud contains billions of droplets having diameters on the or- der 060.01 to 0.02 mm; yet liquid or solid water accounts for less than 10 parts per million of the cloud volume. Clouds are generally classified on the basis of their general form or appearance and alti- tude.

Rainfall types.

Precipitation or Rainfall is defined as water in liquid or solid forms falling to the earth. It happens when continuous condensation in the body of air helps the water droplets or ice crystals to grow in size and weight that the air cannot hold them and as a result these starts falling on the ground under the force of gravity.

Different types of Rainfall are:-

  • Convectional Rainfall :-Excessive heating of the earth’s surface in tropical region results in the vertical air currents. These currents, lift the warm moist air to higher strata of atmosphere. When-the temperature of such a humid air starts falling below dew point continuously, clouds are formed. These clouds cause heavy rainfall which is associated with lightning and thunder. This type of rainfall is called conventional rainfall. It is very common in equatorial region where it is a daily phenomenon in the afternoon
    (b) Orographic or Relief Rainfall :-Orographic rainfall on formed where air rises and cools because of a topographic barrier. When their temperature fall below dew point, clouds are formed. These clouds cause widespread rain on the windward slopes of the mountain range. This type of rain is called orographic rainfall. However when these winds cross over the mountain range and descend along the leeward slopes, they get warm and cause little rain. Region lying on the leeward side of the mountain receiving little rain is called rainshadow area (see figure 12.4). A famous example of orographic rainfall is Cherrapunji on the southern margin of the Khasi Hills in Meghalaya India.
    (c) Convergence or Cyclonic Rainfall:-Convergence rainfall, produced where air currents converge and rise. In tropical regions where opposing air currents have comparable temperatures, the lifting is more or less vertical and is usually accompanied by con- vention. Convectioned activity frequently occurs along fronts where the temperature of the air masses concerned are quite different. Mixing of air along the front also probably contributes to condensation and therefore to the frontal rainfall. When two large air masses of different densities and temperature meet, the warmer moist air mass is lifted above the colder one. When this happens, the rising warm air mass condenses to form clouds which cause extensive down pour. This rainfall is associated with thunder and lightning. ‘This type of rainfall is also called frontal rainfall. This type of rainfall is associated with both warm and cold fronts, (fig. 12.5) It is gener- ally steady and may persist for a whole day or even longer.

 

 

Indian Agriculture- Current Status, Issues & initiatives.

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Indian Agriculture

  • Mainstay of Indian Economy
  • Since independence, undergone a change from being the sector contributing the highest share to the GDP to one contributing the lowest share.
  • Agriculture is a state subject.
  • GDP contribution (Agriculture and allied sector)
    • 5 pc in 1950-51
    • 7 pc in 2008-09 and 14.6 pc in 2009-10. It was 19 pc in 2004-05. (2004-05 prices)
    • Agricultural GDP grew by 0.4 pc in 2009-10 and -0.1 pc in 2008-09.
  • Employment
    • 9 pc in 1961
    • 9 pc in 1999-2000
    • 2 pc in 2008-09
    • 1999-2000: Number at 237.8 million
  • GCF
    • Share in total GCF 2009-10: 7.7 pc (2004-05 prices)
    • GCF as % of agricultural GDP: 2007-08 – 16.3, 2008-09(P) – 19.67, 2009-10(QE) – 20.3
    • GCF as % of total GDP: 2007-08 – 2.69, 2008-09P – 3.09, 2009-10QE – 2.97
  • Contributes to agricultural growth and industrial demand
  • Contributed 10.59 pc of total exports in 2009-10.
  • Due to the large number of workforce in this sector, the growth of agriculture is a necessary condition for inclusive growth.
  • Food grains production
    • Highest in 2008-09: 234. 47 mn t
    • 2009-10: 218.11 mn t

Agriculture and Industry

  • Agriculture as
    • Supplier of wage goods to the industrial sector
    • Provider of raw materials
    • Consumer of agricultural capital goods produced by industry
  • Stagnation in agriculture
    • Get data on CAGR

Land Reforms

  • Great scarcity and uneven distribution of land
  • Focus of agricultural policies in the initial years was on institutional changes through land reforms
  • Two objectives of land reforms in India
    • To remove the impediments to agriculture that arise due to the character of agrarian structure in rural areas
    • To reduce or eliminate the exploitation of tenants/small farmers
  • Four main areas of land reforms in India
    • Abolition of intermediaries (zamindars)
    • Tenancy reforms
    • Land ceilings
    • Consolidation of disparate land holdings
  • Economic arguments for land reforms
    • Equity
    • Small farms tend to be more productive than large farms
    • Owner cultivated plots of land tend to be more productive that those under sharecropped tenancy
  • Abolition of zamindari was successful while the other three areas of land reforms met with limited success
  • Operation Bargha. Also, LR in Kerala
  • Regional trends in LR
  • Effect of land reforms
    • On tenants
      • Absentee landlordism declined
      • Tenancy declined. In some cases, tenants were evacuated from the land.
      • In some cases there was a drift of tenants into landless
      • Where tenants had not been evicted, tenancy was pushed underground
    • On equity
    • On productivity
    • On agrarian power relations
  • The National Commission on Farmers has placed the unfinished agenda in land reform first in its list of five factors central overcome an agrarian crisis
  • Way forwards
    • Land reforms that make tenancy legal and give well defined rights to tenants, including women, are now necessary

Technology and Green Revolution

  • In the early 60s India faced several crises
    • It had to fight two wars: Pakistan and China
    • Severe drought in 1965 and 1966
    • US was using PL-480 food supply as a means to twist India’s arms to meet US interests
  • This called for an overhaul of the agricultural strategy and the need to be self-sufficient in food production
  • Three phases of green revolution
    • 1966-1972
    • 1973-1980
    • 1981-1990
  • 1966-1972
    • C Subramaniam and MSS
    • 1965: Agricultural Prices Commission and Food Corporation of India set up
    • Introduction of HYV seed of wheat from Mexico created by CIMMYT
    • Under the new agricultural policy, the spread of HYVs was supported by public investments in fertilisers, power, irrigation and credit
    • Food grain production shot up
      • 1966-67: 74 mt
      • 1971-72: 105 mt
    • India became nearly self-sufficient in food grains
    • What led to the increased production?
      • Favourable pricing policy led to adequate incentives
      • National research system proceeded to indigenise the new seeds to tackle their shortcomings
      • Availability of inputs including canal water, fertilisers, power and credit
      • Subsidies
      • Role of credit began to be important after 1969
    • 1973-1980
      • This phase saw many challenges
      • Consecutive droughts in 1972-73
      • Oil shock
      • Production fell. Imports began again.
      • Thereafter, government increased fertiliser subsidies
      • Groundwater irrigation increased in  importance
      • HYV technology extended from wheat to rice
    • 1981-1990
      • 1986
        • Rice prod: 63.8 mt (1964: 37)
        • Wheat prod: 47 mt (1964: 12 mt)
      • Even when the ‘worst drought of the century’ struck in 1987, food needs could be adequately met due to buffer stocks
      • HYV technology spread eastward to states like West Bengal and Bihar
      • The impact of HYV technology had started to plateau however
      • Input subsidies kept on increasing
      • 1991: Input subsidy was 7.2 pc of agricultural GDP
    • What was the impact of highly regulated policies on agriculture?
      • There were barriers on pricing, movement and private trading of agricultural produce
      • The external sector was burdened with various tariff and non-tariff barriers to agricultural trade flows
      • The overvalued rupee produced an anti-export environment for agriculture
      • High protection to industry produced high industrial prices and adverse terms of trade for agriculture, reducing the relative profitability of the primary sector
    • What was the aim of agricultural pricing in pre-reform era?
      • Ensure inexpensive food for consumers
      • Protect farmers’ incomes from price fluctuations
      • Keep the balance of payments in check
    • Agriculture in post-reform era
      • Impact: 1. Growth in PCI led to an increase in food demand and also diversification. Terms of trade between agricultural and industrial prices improved in favour of agriculture
      • Increased profitability has led to increase in private investments which are now double the public investment in agriculture.
      • Growth rates
        • 1980s: 3 pc
        • 1990s:
        • 2000s:
        • Tenth Plan: 2.47 pc (as against 7.77 pc of overall economic growth)
      • This has however not translated into reduction of poverty
      • There has been an increase in both urban and rural inequality
    • Deceleration in agricultural growth
      • Declined during 90s
      • Deceleration in the growth of area, production and yield
      • Food production of Rabi crops has off late equalled the Kharif crops. This has to an extent reduced the over dependence on monsoon and imparted some stability to agricultural production
      • Area-wise, the deceleration was more in case of the Indo-Gangetic region
    • The instability in agricultural growth is more in states with high percentage of rain-fed areas
    • Acreage: declining trend in most crops during the period 1995-96 to 2004-05
    • Productivity: sharp decline (1995-2005). Healthy performance of cotton and maize though

Major factors affecting growth potential

  • Lack of long term policy perspective
    • No long term strategy for agricultural development
    • National Agricultural Policy was announced only in the year 2000
    • Sectoral priority to industry from the second FYP
    • Weaknesses of policies followed for agricultural development
      • Policies provided little incentives for the farmers as the prices were depressed and the sector was disprotected vis a vis other sectors of the economy
      • Inward-looking policies
      • Excessive price based focus than non-price factors like water, infrastructure, R&D, extension services etc
    • Investment in Agriculture and Subsidies
      • There have been cutbacks in agricultural investment and extension, but not in subsidies
      • Agricultural subsidy as pc of GDP:
      • Public investment in agriculture declined from 4 pc of agriculture GDP in 1976-1980 to
      • Subsidies on fertiliser, power and irrigation have contributed to soil degradation
      • It is important to reduce subsidies and increase public investment in crucial areas such as soil amelioration, watershed development, groundwater recharge, surface irrigation and other infrastructure
      • Public Sector GCF in agriculture stood at less than Rs 50 bn at 1993-94 prices
      • It is imperative to reduce these subsidies for stepping up public investment in agriculture
      • After 2003, the investments have started to increase. In  2006-07 public sector GCF was 3.7 pc of agricultural GDP and  total GCF was 12.5 pc of agricultural GDP
      • Three areas should get priority in public investments
        • Rural roads
        • Electricity
        • Irrigation projects
        • <all three of them are under Bharat Nirman project>
      • Complimentarity between public and private sector capital formation in agricultural sector. Public sector can create infrastructure while the private investment is essential for short term asset building mainly in the areas of mechanisation, ground levelling, private irrigation etc
    • Lagging research and development efforts
      • After the green revolution, there has been no major breakthrough in agricultural research. GM is a promising area but its safety has not yet been conclusively established.
      • Poor productivity in India compared to other countries and even compared to world average
      • India, however, has the largest public agricultural research establishment in the world. ICAR and agricultural universities
      • India spends only 0.3 pc of agricultural GDP for research as compared to 0.7 pc in other developing countries and 2-3 pc in case of developed countries.
      • There is hardly any scope for expansion of area. Hence, productivity must increase to keep up with the increasing demand. R&D has a lot of role to play here
      • New varieties of seeds need to be developed suited to different regions of the country
      • The research system should be responsive to the changing needs and circumstances
    • Technology generation and dissemination
      • Fixed land. Hence technology
      • Focus on yield as well as sustainable use of land
      • Focus should be on specific requirements of each agro-climatic region
      • Ned to develop much stronger linkages between extension and farmers
    • Rising soil degradation and over-exploitation of groundwater
      • Around 40 pc of Indian’s total geographical area are officially estimated as degraded
      • Soil health is deteriorating in Punjab and Haryana
    • Degradation of natural resources
    • Subsidies vis-a-vis investments and farm support systems
    • Agriculture’s terms of trade and farm price volatility
      • Ensure rapid development of backward farm linkages
    • Summary: Need to correct the policy bias against agriculture, make higher investments, develop new varieties of seeds, conserve natural resources like land and water and provide incentives to the farmers to adopt modernisation

 

Some Issues in Indian Agriculture

  • Low public investment
  • Halt in the modernization of agriculture
  • Agricultural indebtedness
  • Farmer suicides
  • Agricultural imports and future markets

Subsidies

  • Talk about bringing urea under the Nutrient Based Subsidy (NBS) system and decontrolling its prices
  • Downsides
    • Fertilizer subsidy touched almost 1 lakh crore in 2008-09
    • Promotes overuse of fertiliser and thereby catalysing soil degradation
    • As a result, agricultural production in the bread baskets of the country has stagnated, posing a threat to the food security of the country
    • Drylands do not receive the benefit of crores of subsidy given in fertilizers

Government Intitiatives

  • Green Revolution
  • National Policy on Agriculture, 2002
  • National Policy for Farmers, 2007
    • Major policy provisions include provisions for asset reforms, water use efficiency, use of technology, inputs and services like soil health, good quality seeds, credit, support for women etc
    • Focus on millets as well

Agriculture during the 11th plan

  • Flagship schemes
    • Rashtriya Krishi Vikas Yojana
    • National Food Security Mission
    • National Horticulture Mission (2005-06)
    • Integrated Scheme of Pulses, Oilseeds and Maize
    • Technology Mission for Integrated Development of Horticulture in North-east and Himalayan States (2001-02)
    • National Mission for Sustainable Agriculture
    • National Mission on Micro Irrigation was launched in 2010 in addition to the earlier Micro Irrigation Scheme launched in 2006
    • National Bamboo Mission
  • Avg growth of 2.03 pc against the Plan target of 4 pc per annum.
  • For sustainable and inclusive growth
    • Must focus on the small and marginal farmers as well as female farmers
    • Group approach should be adopted so that they can reap economies of scale
    • Bring technology to farmers
    • Improving efficiency of investments
    • Diversifying while also protecting food security concerns
    • Fostering inclusiveness through a group approach
  • Irrigation
    • Envisages creation of an additional potential of 16 mn ha
    • Bharat Nirman aims to bring an additional 1 crore ha of land under irrigation by 2012
    • Accelerated Irrigation Benefits Programme still on

Irrigation

  • 45 pc of nearly 175 mn ha of cropped area is irrigated
  • Trends
    • Nearly trebled from 24 mn ha in 1953-64 to 75 mn ha in 1998-99
    • It accounts for the largest part of total investments in the agricultural sector
    • Importance of ground water as an irrigation source has also increased considerably
  • Uneven access
    • Inter-regional variance
    • Inequality in access within the farming population
  • Areas of concern
    • Depletion of ground water
    • Environmental concerns
    • Costs
  • Steps to take
    • Improving water use efficiency
    • Water governance
    • Economic incentives for efficient use
  • Govt Schemes
    • Accelerated Irrigation Benefits Programme was started during 1996-97. It extends assistance for the completion of incomplete irrigation schemes
  • In 11th FYP – refer previous section

Way Forward

  • Second green revolution (?)
  • Relook at all the issues offering forward and backward linkages in the agricultural production cycle
  • Focus on oilseeds, pulses and coarse cereals
  • Coarse cereals: high nutrition, can be grown in dry areas, enhance fertility of soil in rotation
  • PDS should be reformed: coarse cereals should also be provided through PDS
  • Timely availability of credit at affordable costs
  • Wider extension of insurance facilities to the farm sector
  • Water and irrigation infrastructure
  • Drip irrigation
  • Organic manures should be popularized and their commercial production encouraged
  • Educate farmers about technology and agricultural techniques

Food Security

  • Food security should also incorporate nutritional security. This requires emphasising the increase in production of pulses, fruits, vegetables, poultry and meat.
  • Interpreted broadly
  • Includes nutritional security which particularly incorporates maternal health and infant health due to the involvement of the nutritional aspect
  • Also covers employment security (?)
  • Affordability, accessibility and availability
  • Food security seeks to address all the three dimensions of hunger: chronic, hidden and transient
  • It also is the first step towards inclusive development

Public Distribution System

  • High procurement prices

Irrigation

  • The total irrigation potential in the country has increased from 81.1 mn hectares in 1991-92 to 108.2 mn hectares in March 2010.
  • 1996-97: Accelerated Irrigation Benefit Programme initiated
  • Reservoir Storage Capacity: 151.77 billion cubic metres

Agricultural Pricing

  • To ensure
    • Remunerative prices to growers
    • Encouraging higher investment and production
    • Safeguard the interest of consumers by making sure that adequate supplies are available
  • It also seeks to evolve a balanced and integrated price structure in the perspective of the overall needs of the economy

 

Investment in Agriculture

  • FAO estimates that global agricultural production needs to grow 70 pc by 2050 in order to meet projected food demand
  • Hence investment should grow by a whopping 50 pc
  • In India, public investment in agriculture has witnessed a steady decline from the 6th FYP onwards
  • Share of investment in agriculture has been between 8-10 pc
  • Most of this has gone into current expenditure in the form of increased output and input subsidies
  • Though private sector investment has been increasing, it has not proved to be enough
  • Decreased public spending in creation of supporting infrastructure in rural areas has discouraged private investment in this sector
  • Some of the measures could be
    • Investment in general service like R&D, education, marketing and rural infrastructure
    • Increased investment in rainfed areas
    • Private sector participation
    • Increased investment for sustainable development

 

WTO and Agriculture

 

  • Uruguay Round multilateral trade negotiations were concluded after 7 years of negotiation in December 1993
  • The WTO Agreement on Agriculture was one of the main agreements which was negotiated
  • Agreement on Agriculture contains provisions in three broad areas of agriculture
    • Market Access
    • Domestic Support
    • Export Subsidies
  • Market Access
    • This is the most important aspect of the negotiation because all countries restrict market access while only few have export subsidies and domestic support
    • This includes tariffication, tariff reduction and access opportunities
    • Tariffication means that all NTTBs should be withdrawn (such as quotas, minimum export prices etc)
    • Adopts a single approach using a tiered formula
    • Single approach: everyone except LDCs have to contribute by improving market access for all products
    • Sensitive products: All countries can list some sensitive products and are allowed flexibility in the way these products are treated, although even sensitive products have to see ‘substantial improvements’ in market access.
    • Special and differential treatment
      • Purpose: for rural development, food security and livelihood security
      • Specifically, special treatment is to be given to developing countries in ‘all elements of the negotiation’, including ‘lesser’ commitments in the formula and long implementation period
      • Special products: developing countries will be given additional flexibility for products that are specially important for their food security, livelihood security and rural development.
      • Special Safeguard Mechanisms: is intended to provide contingent protection to poor farmers in developing countries from negative shocks to import prices or from surges in imports. [Safeguards are contingency restrictions on imports taken temporarily to deal with special circumstances such as a sudden surge in imports. AoA has special provisions on safeguards. In agriculture safeguards, (unlike normal safeguards) can be triggered automatically when import volumes rise above a certain level or if prices fall below a certain level; and it is not necessary to demonstrate that serious injury is being caused to the domestic industry]
    • AoA requires (from 1995)
      • 36% average reduction by developed countries, with a minimum per tariff line reduction of 15% over six years
      • 24% average reduction by developing countries with a minimum per tariff line reduction of 10% over ten years
    • Domestic Support (subsidies)
      • AoA structures domestic support into three categories
        • Green Box
        • Amber Box
        • Blue Box
      • Green Box
        • Non (or minimal) trade distorting subsidies
        • They have to be government funded and must not involve price support
        • They tend to be programmes that are not targeted at particular products and include direct income supports for farmers that are not related to current production levels or prices. They also include environmental protection and regional developmental programmes. These subsidies are therefore allowed without limits
      • Amber Box
        • All domestic support measures considered production and trade fall into the amber box
        • These include measures to support prices, or subsidies directly related to production quantities
        • These supports are subject to limits which are allowed: 5% of total production for developed countries, 10% for developing countries
        • Reduction commitments are expressed in terms of a “Total Aggregate Measurement of Support” (Total AMS)
      • Blue Box
        • This is the “amber box with conditions” – conditions designed to reduce distortion
        • Any support that would normally be in the amber box, is placed in the blue box if the support also required farmers to limit production
        • At present there are no limits on spending on blue box subsidies.
      • Export subsidies
        • Developed countries are required to reduce their export subsidy by 36% (by value) or 21% (by volume) over the six years
        • For developing countries the % cuts are 24% (by value) or 14% (by volume) over 10 years
      • India’s commitment
        • As India was maintaining QRs due to balance of payments reasons (which is a GATT consistent measure), it did not have to undertake any commitments in regard to market access
      • In India, exporters of agricultural commodities do not get any direct subsidy. Indirect subsidies are given

 

 

Food Processing

  • Food processing is a large sector that covers activities such as agriculture, horticulture, plantation, animal husbandry and fisheries
  • Ministry of Food Processing indicated the following segments within the Food Processing industry:
    • Dairy, fruits and vegetable processing
    • Grain processing
    • Meat and poultry processing
    • Fisheries
    • Consumer foods including packaged foods, beverages and packaged drinking water
  • Industry is large and has grown after 1991. However, of the country’s total agriculture and food produce, only 2 per cent is processed.
  • FP has 9% share in manufacturing
  • Structure
    • 42 pc: Unorganised
    • 33 pc: SSI
    • 25 pc: Organised

 

Constraints & Drivers of Growth
Changing lifestyles, food habits, organized food retail and urbanization are the key factors for processed foods in India, these are post-liberalization trends and they give boost to the sector.
There has been a notable change in consumption pattern in India. Unlike earlier, now the share and growth rates for fruits, vegetables, meats and dairy have gone higher compared to cereals and pulses. Such a shift implies a need to diversify the food production base to match the changing consumption preferences.
Also in developed countries it has been observed that there has been a shift from carbohydrate staple to animal sources and sugar. Going by this pattern, in future, there will be demand for prepared meals, snack foods and convenience foods and further on the demand would shift towards functional, organic and diet foods.
Some of the key constraints identified by the food processing industry include:

  • Poor infrastructure in terms of cold storage, warehousing, etc
  • Inadequate quality control and testing infrastructure
  • Inefficient supply chain and involvement of middlemen
  • High transportation and inventory carrying cost
  • Affordability, cultural and regional preference of fresh food
  • High taxation
  • High packaging cost

In terms of policy support, the ministry of food processing has taken the following initiatives:

  • Formulation of the National Food Processing Policy
  • Complete de-licensing, excluding for alcoholic beverages
  • Declared as priority sector for lending in 1999
  • 100% FDI on automatic route
  • Excise duty waived on fruits and vegetables processing from 2000 – 01
  • Income tax holiday for fruits and vegetables processing from 2004 – 05
  • Customs duty reduced on freezer van from 20% to 10% from 2005 – 06
  • Implementation of Fruit Products Order
  • Implementation of Meat Food Products Order
  • Enactment of FSS Bill 2005
  • Food Safety and Standards Bill, 2005
  • Mega Food Parks

Apart from these initiatives, the Centre has requested state Governments to undertake the following reforms:

  • Amendment to the APMC Act
  • Lowering of VAT rates
  • Declaring the industry as seasonal
  • Integrate the promotional structure

 

Plan Schemes

During the 10th Plan, the Ministry implemented Plan schemes for Technology Upgradation/Modernization/Establishment of Food Processing Industries, Infrastructure Development, Human Resource Development, Quality Assurance, R&D and other promotional activities.

In the 11th Plan, it has been proposed to continue assistance to the above schemes with higher levels of assistance. In the 11th Plan, the Ministry proposes to launch a revamped Infrastructure Scheme under which it will promote setting up of Mega Food Parks, cold chain infrastructure, value added centres and packaging centres. The Mega Food Park Scheme will provide backward and forward linkages as well as reliable and sustainable supply chain. The emphasis will be on building strong linkages with agriculture and horticulture, enhancing project implementation capabilities, increased involvement of private sector investments and support for creation of rural infrastructure to ensure a steady supply of good quality agri/horticulture produce. It will provide a mechanism to bring farmers, processors and retailers together and link agricultural production to the market so as to ensure maximization of value addition, minimize wastages and improve farmers’ income. The Mega Food Park would be a well-defined agri/horticultural-processing zone containing state of the art processing facilities with support infrastructure and well established supply chain. The primary objective of the proposed scheme is to facilitate establishment of integrated value chain, with processing at the core and supported by requisite forward and backward linkages. It is envisaged that the implementation of the projects would be assisted by professional Project Management Agencies (PMA) from concept to commissioning. In 11th Plan it is planned to support establishment of thirty (30) Mega Food Parks in various parts of the country.

Vision 2015 on Food Processing Industries

A vision, strategy and action plan has also been finalized for giving boost to growth of food processing sector. The objective is to increase level of processing of perishable food from 6% to 20%, value addition from 20% to 35% and share in global food trade from 1.6% to 3%. The level of processing for fruits and vegetables is envisaged to increase from the present 2.2% to 10% and 15% in 2010 and 2015 respectively. The Cabinet has approved the integrated strategy for promotion of agri-business and vision, strategy and action plan for the Food Processing Sector, based on the recommendations made by the Group of Ministers (GOM).

Integrated Food Law

An Integrated Food Law, i.e. Food Safety and Standards Act, 2006 was notified on 24.8.2006. The Act enables in removing multiplicity of food laws and regulatory agencies and provide single window to food processing sector. Ministry of Health & Family Welfare has been designated as the nodal Ministry for administration and implementation of the Act.

National Institute of Food Technology Entrepreneurship & Management (NIFTEM)

The Ministry has set up a National Institute of Food technology Entrepreneurship & Management (NIFTEM) at Kundli (Haryana). The Institute will function as a knowledge centre in food processing. Certificate of Incorporation of NIFTEM as a section 25 Company under the Companies act 1956 has been obtained.

 

SWOT Analysis of Food–Processing Industry
Strengths

  • Abundant availability of raw material
  • Priority sector status for agro-processing given by the central Government
  • Vast network of manufacturing facilities all over the country
  • Vast domestic market

Weaknesses

  • Low availability of adequate infrastructural facilities
  • Lack of adequate quality control and testing methods as per international standards
  • Inefficient supply chain due to a large number of intermediaries
  • High requirement of working capital.
  • Inadequately developed linkages between R&D labs and industry.
  • Seasonality of raw material

Opportunities

  • Large crop and material base offering a vast potential for agro processing activities
  • Setting of SEZ/AEZ and food parks for providing added incentive to develop greenfield projects
  • Rising income levels and changing consumption patterns
  • Favourable demographic profile and changing lifestyles
  • Integration of development in contemporary technologies such as electronics, material science, bio-technology etc. offer vast scope for rapid improvement and progress
  • Opening of global markets

Threats

  • Affordability and cultural preferences of fresh food
  • High inventory carrying cost
  • High taxation
  • High packaging cost

 

Subsidies

 

Fertilizer Policy:    Urea is the only fertilizer under statutory price control.  Government of India has introduced nutrient based subsidy with effect from 1st April, 2010 in respect of phosphatic and potassic  fertilizers. Under the policy, subsidy is based  on the nutrient (N,P,K and S) content of the  decontrolled P and K fertilizers. Price of Urea has been increased by 10% while price of other subsidized fertilizers are being maintained around current levels. Additional subsidy on micronutrients has been introduced on Boron and Zinc, to begin with.  In order to promote the concept of balanced use of fertilizers and to encourage use of micronutrients, several fertilizers fortifed with Boron and Zinc have been incorporated in the Fertilizer (Control) Order, 1985.

 

 

 

POULTRY FARMING and SILVER REVOLUTION IN INDIA

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POULTRY FARMING (SILVER REVOLUTION) IN INDIA

  • practice of raising poultry, such as chickens, turkeys, ducks, geese, as a subcategory of animal husbandry, for the purpose of farming meat or eggs for food.
  • requires small capital and provides additional income and job opportunities to a large number of rural population in the shortest possible time.
  • The vast majority of poultry are farmed using factory farming techniques.
  • The contrasting method of poultry farming in free range and friction between the two main methods, has led to long term issues of ethical consumerism.
  • Opponents of the factory farming argue that it harms the environment and creates health risks, as well as abuses animals.
  • In contrast, proponents of factory farming highlight its increased productivity, stating that the animals are looked after in state-of-the art confinement facilities and are happy; that it is needed to feed the growing global human population; and that it protects the environment.

 

Poultry Farming in India

  • Poultry farming in India is quite old.
  • At present, more than three million people are directly or indirectly employed in poultry farming.
  • Further, landless labourers derive more than 50 per cent of their income from livestock, especially poultry.
  • Uninterrupted supplies of feed as well as avian influenza are critical for the continued robust growth of the poultry sector.
  • The first outbreak of avian influenza occurred in India in the state of Maharashtra in the Nandurbar district on 18th Feb. 2006.
  • The Central Poultry Development Organisation has been playing a pivotal role in the implementation of the policies of the Government with respect to poultry as a tool for alleviating nutritional hunger and palliating the impecuniosity’s of the resource-poor farmers, especially the women.
  • The mandate of the Central Poultry Development Organisation has been specifically revised, by restructuring all poultry units of this Department to focus on improved indigenous birds, which lay on an average 180-200 eggs per annum and have a vastly improved FCR ratio in terms of feed consumption and weight gain.
  • The Central Poultry Development Organisations have been entrusted with the responsibility of producing excellent germplasm in the form of day-old chicks and hatching eggs of these varieties like Nierbheek, Hitkari, Vanaraja, Shyama, Cari, Chabro, etc.
  • Besides, these organisations are also playing a crucial role in analysing feed samples.
  • A new Centrally-sponsored scheme called Assistance to State Poultry, is being implemented during the Tenth Plan where one time assistance is provided to suitably strengthen the farms in terms of hatching, brooding, and rearing of birds with provision for feed mill and their quality monitoring and in-house disease diagnostic facilities.
  • A new scheme, Dairy/Poultry Venture Capital Fund, has been launched during the 2004-05, wherein there is a provision to grant subsidy on interest payment.
  • The nodal agency for the implementation of this scheme is NABARD through nationalized commercial bank.

 

DRY FARMING IN INDIA

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DRY FARMING IN INDIA

  • The spread in the regions where the average annual rainfall is less than 75 cm.
  • rainfall is scanty and uncertain, where hot and dry conditions prevail.
  • It is not only that the average annual rainfall is low, the variability of rainfall in these areas varies between 25 to 60 per cent.
  • Agriculture belongs to fragile, high risking and low productive agricultural ecosystem.
  • The areas in which more than 75 cm of average annual rainfall is recorded are known as the areas of rain-fed agriculture.
  • In India dry-lands cover about 32 million hectares or about 25 per cent of the total arable land.
  • The dry farming areas cover the greater parts of Rajasthan and Gujarat. Moreover, there are small tracts of dry land farming in Punjab, Haryana, Maharashtra, Andhra Pradesh, Karnataka, Himachal Pradesh, Jammu and Kashmir, harkhand, Orissa, Uttarakhand, Uttar Pradesh, West Bengal and Tamil Nadu.
  • These areas having scanty rainfall and high variability of rainfall are adversely affected by erratic precipitation, frequent droughts, high temperature, and high wind velocity resulting in soil erosion.

 

Significant Features of Dry Farming

  • Moisture conservation is basic to dry farming. In order to achieve this objective, the field is ploughed repeatedly, especially during the rainy season.
  • Sowing of crops in alternate years or fallowing of land after each harvesting of crop. The fallowing of agricultural land helps in the recuperation of soil fertility.
  • Pulverisation of the soil before sowing.
  • Regular hoeing and weeding of the crop. Hoeing is generally done before sun-rise so that the night dew may be mixed into the soil to provide moisture to the crops.
  • Covering of the land with straw to prevent evaporation of the soil moisture and to control soil erosion.
  • Livestock keeping and dairying are also important allied agricultural activities in the dry farming regions.

Crops

  • The main crops grown in the dry farming areas are coarse, grains (maize, millets, bajra), pulses, groundnut, oilseeds and fodder.
  • Though 75 per cent of the total population of dry-farming regions are directly or indirectly dependent on agriculture, their per capita income, and standard of living are significantly low.

 

Main Problems of Dry Farming

The main problems of dry farming agriculture are as under:

  1. Scarcity of precipitation, erratic occurrence of rains leading to famines, droughts, and floods.
  2. The soils, being sandy, lack in humus and organic nutrients.
  3. The dry farming areas are highly vulnerable to soil erosion.
  4. These are low yields per unit area.
  5. In the absence of moisture and irrigation, the use of High Yielding Varieties and new technology is not possible.
  6. Most of the farmers in the dry farming regions being poor are not able to apply the new costly inputs.
  7. These areas are not having the basic irrigation and other infrastructural facilities, like roads, marketing and storage

 

Strategy for Development

  • As stated earlier, agriculture is a highly vulnerable occupation in the scanty rainfall recording areas in which dry farming is practiced.
  • In dry farming areas, water harvesting should be done. The government and other non-government agencies should provide the necessary guidance to the people.
  • Seeds of food crops which are drought resistant should be provided to the farmers at a subsidized rate.
  • Efforts should be made to check soil erosion by adopting soil conservation practices.
  • The farmers should space their crops at a wide gap and there should be regular weeding and hoeing.
  • Seeds of the quick and short duration maturing crops should be developed.
  • Cultivation of crops requiring more moisture should be done in the low lying areas, especially in the lower parts of the catchment.
  • Cotton should be grown only in the areas where rainfall is more dependable or sprinkle irrigation is available.
  • Soil fertility should be enhanced by applying cow dung and compost manures.
  • Repeated tilling of the field is required during the rainy season.
  • Research should be promoted in the dry land farming.

 

Plate tectonics

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The uppermost outer solid and rigid layer of the earth is called crust. Its thickness varies considerably. It is as little as 5 km thick beneath the oceans at some places but under some mountain ranges it extends upto a depth of 700km. Below the crust denser rocks are found, known as mantle crust. This upper part of mantle upto an average depth of 100 km from the surface is solid. This solid mantle plus upper crust form a comparatively rigid block termed as lithosphere. Mantle is partially molten between 100 to 250 km depth. This zone is said to be asthenosphere, also known as Mohr discontinuity, a simplification of Mohorovicic, the name of the seismologist who discovered it.
The lithosphere is broken into several blocks. These blocks are known as plates, which are moving over asthenosphere. There are seven major plates.

 

While the continents do indeed appear to drift, they do so only because they are part of larger plates that float and move horizontally on the upper mantle asthenosphere. The plates behave as rigid bodies with some ability to flex, but deformation occurs mainly along the boundaries between plates.

 

 

 

The plate boundaries can be identified because they are zones along which earthquakes occur.Plate interiors have much fewer earthquakes.

There are three types of plate boundaries:

  1. Divergent Plate boundaries, where plates move away from each other.
  2. Convergent Plate Boundaries, where plates move toward each other.
  3. Transform Plate Boundaries, where plates slide past one another.

Divergent Plate Boundaries

These are oceanic ridges where new oceanic lithosphere is created by upwelling mantle that melts, resulting in basaltic magmas which intrude and erupt at the oceanic ridge to create new oceanic lithosphere and crust. As new oceanic lithosphere is created, it is pushed aside in opposite directions. Thus, the age of the oceanic crust becomes progressively older in both directions away from the ridge.

Because oceanic lithosphere may get subducted, the age of the ocean basins is relatively young. The oldest oceanic crust occurs farthest away from a ridge. In the Atlantic Ocean, the oldest oceanic crust occurs next to the North American and African continents and is about 160 million years old (Jurassic)

. In the Pacific Ocean, the oldest crust is also Jurassic in age, and occurs off the coast of Japan.

Because the oceanic ridges are areas of young crust, there is very little sediment accumulation on the ridges. Sediment thickness increases in both directions away of the ridge, and is thickest where the oceanic crust is the oldest. Knowing the age of the crust and the distance from the ridge, the relative velocity of the plates can be determined.

Relative plate velocities vary both for individual plates and for different plates.

Sea floor topography is controlled by the age of the oceanic lithosphere and the rate of spreading.

If the spreading rate (relative velocity) is high, magma must be rising rapidly and the lithosphere is relatively hot beneath the ridge. Thus for fast spreading centers the ridge stands at higher elevations than for slow spreading centers. The rift valley at fast spreading centers is narrower than at slow spreading centers. As oceanic lithosphere moves away from the ridge, it cools and sinks deeper into the asthenosphere. Thus, the depth to the sea floor increases with increasing age away from the ridge.

 

Convergent Plate Boundaries

When a plate of dense oceanic lithosphere moving in one direction collides with a plate moving in the opposite direction, one of the plates subducts beneath the other. Where this occurs an oceanic trench forms on the sea floor and the sinking plate becomes a subduction zone. The Wadati-Benioff Zone, a zone of earthquakes located along the subduction zone, identifies a subduction zone. The earthquakes may extend down to depths of 700 km before the subducting plate heats up and loses its ability to deform in a brittle fashion.

As the oceanic plate subducts, it begins to heat up causing the release water of water into the overlying mantle asthenosphere. The water reduces the melting temperature and results in the production of magmas. These magmas rise to the surface and create a volcanic arc parallel to the trench. If the subduction occurs beneath oceanic lithosphere, an island arc is produced at the surface (such as the Japanese islands, the Aleutian Islands, the Philippine islands, or the Caribbean islands

Transform Plate Boundaries

Where lithospheric plates slide past one another in a horizontal manner, a transform fault is created. Earthquakes along such transform faults are shallow focus earthquakes.

Most transform faults occur where oceanic ridges are offset on the sea floor. Such offset occurs because spreading takes place on the spherical surface of the Earth, and some parts of a plate must be moving at a higher relative velocity than other parts One of the largest such transform boundaries occurs along the boundary of the North American and Pacific plates and is known as the San Andreas Fault. Here the transform fault cuts through continental lithosphere

Triple Junctions occur at points where thee plates meet.

Hot Spots

Areas where rising plumes of hot mantle reach the surface, usually at locations far removed from plate boundaries are called hot spots. Because plates move relative to the underlying mantle, hot spots beneath oceanic lithosphere produce a chain of volcanoes. A volcano is active while it is over the vicinity of the hot spot, but eventually plate motion results in the volcano moving away from the plume and the volcano becomes extinct and begins to erode.

Because the Pacific Plate is one of the faster moving plates, this type of volcanism produces linear chains of islands and seamounts, such as the

  • Hawaiian – Emperor chain, the Line
  • Islands, the Marshall-Ellice Islands,
  • and the Austral seamount chain

 

 Horizontal and vertical distribution of temperature, inversion of temperature

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The temperature is the measurement in degrees of how hot (or cold) a thing (or a place) is.
The temperature of the atmosphere is not same across the Earth. It varies in spatial and temporal dimensions. The temperature of a place depends largely on the insolation received by that place. The interaction of insolation with the atmosphere and the earth’s surface creates heat which is measured in terms of temperature. It is important to know about the temperature distribution over the surface of the earth to understand the weather, climate, vegetation zones, animal and human life etc. following factors determine the temperature of air at any place.

  1. The latitude of the place – Intensity of insolation depends on the latitude. The amount of insolation depends on the inclination of sun rays, which is further depends upon the latitude of the place. At the equator sun’s rays fall directly overhead throughout the year. Away from the equator towards poles, the inclination of the Sun’s rays increases. In conclusion, if other things remain the same, the temperature of air goes on decreasing from the equator towards poles.
  2. The altitude of the place – the atmosphere is largely heated indirectly by re-radiated terrestrial radiation from the earth’s surface. Therefore, the lower layers of the atmosphere are comparatively warmer than the upper layers, even in the same latitudes. For example, Ambala (30 21’ N) and Shimla (31 6’) are almost at the same latitude. But the average temperature of shimla is much lower than the Ambala. It is because Ambala is located in plain at an altitude of 272 m above sea level whereas Shimla is located at an altitude of 2202 m above sea level. In other words, the temperature generally decreases with increasing height (figure 6(a)). The rate of decrease of temperature with height is termed as the normal lapse rate. It is 6.5°C per 1,000 m. That’s why, the mountains, even in the equatorial region, have snow covered peaks, like Mt. Kilimanjaro, Africa.
  3. Distance from the Sea – the land surface is heated at a faster rate than the water N surface. Thus the temperature of the air over land and water surfaces is not the same Student Notes: at a given time. In summers, the sea water is cooler than the land and in winters, land is much colder than the sea water. The coastal areas experience the sea breezes during the daytime and the land breezes during the night time. This has a moderating influence on the temperature of the coastal areas. Against this the places in the interior, far away from the sea, have extreme climate. The daily range of temperature is less near the coastal area and it increases with increase in distance from the sea coast (figure 6(b)). The low daily range of temperature is the characteristic of marine climate. That’s why, the people of Mumbai have hardly any idea of extremes of temperature.

(a) Horizontal Distribution of Temperature
Distribution of temperature across the latitudes over the surface of the earth is called its horizontal distribution. On maps, the horizontal distribution of temperature is commonly shown by “Isotherms”, lines connecting points that have equal temperatures. An isotherm is made of two words ‘iso’ and ‘therm’, ‘Iso’ means equal and ‘therm’ means” temperature. If you study an isotherm map you will find that the distribution of temperature is uneven. The factors responsible for the uneven distribution of temperature are as follows:
(i) Latitude
(ii) Land and Sea Contrast
(iii) Relief and Altitude
(iv) Ocean Currents
(v) Winds
(vi) Vegetation Cover
(vii) Nature of the soil
(viii) Slope and Aspect

(b) Vertical Distribution of Temperature
The permanent snow on high mountains, even in the tropics, indicate the decrease of temperature with altitute. Observations reveals that there is a fairly regular decrease in temperature with an increase in altitude. The average rate of temperature decrease upward in the troposphere is about 6 C per km, extending to the tropopause. This vertical gradient of temperature is commonly referred to as the standard atmosphere or normal lapse rate, but is varies with height, season, latitude and other factors. Indeed the actual lapse rate of temperature does not always show a decrease with altitude.

Temperature Inversion

Temperature decreases with increase in altitude. In normal conditions, as we go up, temperature decreases with normal lapse rate. It is 6.5°C per 1,000 m. Against this normal rule sometimes, instead of decreasing, temperature may rise with the height gained. The cooler air is nearer the earth and the warmer air is aloft. This rise of temperature with height is known as Temperature inversion. Temperature inversion takes place under certain specific conditions. These are discussed below:

  •  Long winter nights – if in winters the sky is clear during long nights, the terrestrial radiation is accelerated. The reason is that the land surface gets cooled fairly quickly. The bottom layer of atmosphere in contact with the ground is also cooled and the upper layer remains relatively warm.
  • Cloudless clear sky – The clouds obstruct the terrestrial radiation. But this radiation does not face any obstacles for being reflected into space when the sky is clear. Therefore the ground is cooled quickly and so is the air in contact with it cooled.
  • Dry air – humid air absorbs the terrestrial radiation but dry air is no obstruction to terrestrial radiation and allows the radiation to escape into space.
  • Calm atmosphere – the blowing of winds bring warm and cold air into contact. Under conditions of calm atmosphere the cold air stays put near the ground.
  • Ice covered surface – in ice covered areas due to high albedo less insolation is received. During night due to terrestrial radiation most of the heat is lost to atmosphere and the surface is cooled. The air in contact with it is also cooled but the upper layer remains warm.

 

 Air masses and fronts

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Airmasses

 

An airmass is a large body of air with relatively uniform thermal and moisture characteristics. Airmasses cover large regions of the earth, typically several hundred thousand square kilometers. Airmasses can be as deep as the depth of the troposphere or as shallow as 1 to 2 km.
Airmasses form when air remains over a relatively flat region of the earth* with homogeneous surface characteristics for an extended period of time. ( Canadian and Siberian plains, cool oceanic regions such as the North Atlantic and Pacific, deserts, such as the Sahara and the American southwest, and tropical oceanic regions including the equatorial Atlantic and Pacific, and smaller water bodies such as the Caribbean Sea and the Gulf of Mexico).

Polar air masses, containing little moisture and low temperatures move downward from the poles.  Air masses that form over water are generally moist, and those that form over the tropical oceans are both moist and warm. Because of the Coriolis effect due to the Earth’s rotation, air masses generally move across North America from west to east.  But, because of the differences in moisture and heat, the collision of these air masses can cause instability in the atmosphere.

Polar air mass is cold and tropical air mass is warm. When cold air mass and warm air mass blow against each other, the boundary line of convergence separating the two air masses is termed as front. When the warm air mass, moves upward over the cold air mass the front formed in such a situation is called warm front. On the contrary, when the cold air mass advances faster and undercuts the warm air mass and forces the warm air upwards, the front so formed is called cold front. The frontal surface of cold front is steeper than that of a warm front . A prevailing air mass in any region – polar, tropical, maritime or continental largely controls the regions general weather.

Different air masses are:-

  1. Maritime tropical (mT)
    ii. Continental tropical (cT)
    iii. Maritime polar (mP)
    iv. Continental polar (cP)
    v. Continental arctic (cA).

Where ‘m’ stands for Maritime; ‘c’ stands for continental; ‘T’ stands for tropical; ‘P’ stands for polar and ‘A’ stands for arctic region.

Fronts

An important properties of air is that it is a poor conductor of energy. This means that when two different bodies of air come together, they do not readily mix. Rather, each body of air will retain its individual properties, and a boundary forms between them. When two large air masses meet, the boundary that separates them is called a front. Fronts represent fairly abrupt transitions between two large air masses. The warm, moist air might dominate an area hundreds of miles across, while in another part of the continent a cold, dry air mass holds sway over an equally large region. However, where the two air masses meet, the transition layer between them may be only a few tens of miles across, clearly a sharp transition between two massive bodies of air.

Fronts are recognized by the following properties:-

  • Sharp temperature changes over a relatively short distance. Sometimes change of 10 to 20 C may be observed.
  • Change in moisture content
  • Rapid shifts in wind direction
  • Pressure changes
  • Clouds and precipitation patterns

Types of Fronts:-

Warm Fronts: A warm front occurs when a warm air mass advances and replaces a cold air mass. On a weather map, a warm front is depicted as a red arc, with red semicircles pointing in the direction of the advancing warm air.

Cold Fronts :-A cold front occurs when a mass of cold air advances into a region of warmer air.

Stationary Fronts:- A stationary front forms when a cold front or warm front stops moving. This happens when two masses of air are pushing against each other but neither is powerful enough to move the other. Winds blowing parallel to the front instead of perpendicular can help it stay in place.

Occluded Fronts:- Sometimes a cold front follows right behind a warm front. A warm air mass pushes into a colder air mass (the warm front) and then another cold air mass pushes into the warm air mass (the cold front). Because cold fronts move faster, the cold front is likely to overtake the warm front. This is known as an occluded front

 

 

Sustainable and Inclusive Growth

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The term Sustainable growth became prominent after the World Conservation Strategy Presented in 1980 by the International Union for the Conservation of Nature and Natural Resources. Brundland Report(1987) define sustainable development as the a process which seek to meet the needs and aspirations of the present generation without compromising the ability of the future generation to meet their own demands.

Natural resources are limited and thus sustainable development promotes their judicious use and put emphasis on conservation and protection of environment.Global warming and Climate change has brought the issue of Sustainable development in prominence.

Inclusive Growth is economic growth that creates opportunity for all segments of the population and distributes the dividends of increased prosperity, both in monetary and non-monetary terms, fairly across society.Indian Plans after the independence were based on the downward infiltration theory, which failed to bring equitable growth to all the sections of the Indian society.

Approach paper of 11th five year plan talked about “Inclusive and more faster growth” through bridging divides by including those in growth process who were excluded. Divide between above and Below Poverty Line, between those with productive jobs and those who are unemployed or grossly unemployed is at alarming stage.

Liberalization and Privatization after 1990’s have brought the nation out of the hindu growth rate syndrome but the share of growth has not been equitably distributed amongst different sections of Indian Society.

Various dimensions of Inclusive growth are:-

  1. economic
  2. social
  3. financial
  4. environmental

Important issues that are needed to be addressed to achieve the inclusive growth are:-

  1. Poverty
  2. Unemployment
  3. Rural Infrastructure
  4. Financial Inclusion
  5. Balanced regional development
  6. Gender equality
  7. Human Resource Development (Health, Education, Skill Development)
  8. Basic Human Resources like sanitation, drinking water, housing etc.

Government has launched several programs and policies for Inclusive growth such as:-

  1. MNREGA
  2. Jan Dhan Yojna
  3. Atal Pension Yojna
  4. Skill India Mission
  5. Deen Dayal Upadhyaya Gram Jyoti Yojana
  6. Pradhan Mantri Suraksha Bima Yojana
  7. Pradhan Mantri Jeevan Jyoti Bima Yojana
  8. Sukanya Samridhi Yojana
  9. Pradhan Mantri  Garib Kalyan Yojana
  10. Jan Aushadhi Yojana (JAY)
  11. Nai Manzil Scheme for minority students
  12. The Pradhan Mantri Awas Yojana (PMAY) or Housing for all by 2022

inclusive groth

 

 

agriculture

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the syllabus states that -mazor crops,cropping patterns in various parts of the country,different types of irrigation system,storage,transport and marketing of agricultural product,and issues related to constraints,e-tec hnology in the aid of farmers….
the link for yojna January  2011 for agriculture is for dowloading dere would be a link as  
download pdf

also ncert geography land use and agriculture is
https://docs.google.com/file/d/0B_FR6Jkv0z2ceE8wX05oUUN1b0k/edit?usp=sharing

for e-tec hnology in the aid of farmers.there is great krukshetra its link is


 krukshetra agriculture productivity dec 2011 link 
 krukshetra  climate change and suistainable agriculture march 2011 link
 krukshetra soil rejuvenation  nov 2011 link
and most imp krukshetra june 2013…sorry no pdf copy yet released…
and
yojna budget march 2011
yojna celebration 60 years jan 2010 
yojna north eas dec 2011