NCERT Solutions for Class 12 Geography Chapter 5 Land Resources And Agriculture – Here are all the NCERT solutions for Class 12 Geography Chapter 5. This solution contains questions, answers, images, explanations of the complete chapter 5 titled Land Resources And Agriculture taught in Class 12. If you are a student of Class 12 who is using NCERT Textbook to study Geography, then you must come across chapter 5 Land Resources And Agriculture. After you have studied lesson, you must be looking for answers of its questions. Here you can get complete NCERT Solutions for Class 12 Geography Chapter 5 Land Resources And Agriculture.
NCERT Solutions Class 12 Geography Chapter 5 Land Resources And Agriculture
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|Book||India People And Economy|
Land Resources And Agriculture
NCERT Solutions Class 12 Geography chapter 5 Land Resources And Agriculture
Class 12, Geography chapter 5, Land Resources And Agriculture solutions are given below in PDF format. You can view them online or download PDF file for future use.
Land Resources And Agriculture
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Question & Answer
Q.1: Choose the right answer from the four alternatives given below. (i) Which one of the following is NOT a land-use category? (a) Fallow land (b) Marginal land (c) Net Area Sown (d) Culturable Wasteland (ii) What one of the following is the main reason due to which share of forest has shown an increase in the last forty years? (a) Extensive and efficient efforts of afforestation (b) Increase in community forest land (c) Increase in notified area allocated for forest growth (d) Better people's' participation in managing forest area. (iii) Which one of the following is the main form of degradation in irrigated areas? (a) Gully erosion (b) Wind erosion (c) Salinisation of soils (d) Siltation of land (iv) Which one of the following crops is not cultivated under dryland farming? (a) Ragi (b) Jowar (c) Groundnut (d) Sugarcane (v) In which of the following group of countries of the world, HYVs of wheat and rice were developed? (a) Japan and Australia (b) U.S.A. and Japan (c) Mexico and Philippines (d) Mexico and Singapore
Ans : (i) (b) Marginal land (ii) (c) Increase in notified area allocated for forest growth (iii) (c) Salinisation of soils (iv) (d) Sugarcane (v) (c) Mexico and Philippines
Q.2: Answer the following questions in about 30 words. (i) Differentiate between barren and wasteland and culturable wasteland. (ii) How would you distinguish between net sown area and gross cropped area? (iii) Why is the strategy of increasing cropping intensity important in a country like India? (iv) How do you measure total cultivable land? (v) What is the difference between dryland and wetland farming?
Ans : (i)
- Barren and Wastelands : The land which may be classified as a wasteland such as barren hilly terrains, desert lands, ravines, etc. normally cannot be brought under cultivation with the available technology.
- Culturable Waste-Land : The land which is left uncultivated for more than five years is included in this category. It can be brought under cultivation after improving it through reclamation practices.
- Net sown area: The physical extent of land on which crops are sown and harvested is known as net sown area.
- Gross cropped area: The area which includes net sown area plus area sown and harvested twice or thrice in a year.
- To increase the production of foodgrains for the increasing population and to meet out the demand of raw materials for the agro-based industries.
- A higher cropping intensity is desirable not only fuller utilisation of land resources but also for reducing unemployment in the rural areas.
- The dryland farming is largely confined to the regions having annual rainfall less than 75 cm.
- These regions grow hardy and drought resistant crops such as ragi, bajra, moong, gram and guar (fodder crops) and practise various measures of soil moisture conservation and rain water harvesting. Wetland Farming
- The rainfall is in excess of soil moisture requirement of plants during rainy season. Such regions may face flood and soil erosion hazards.
- These areas grow various water intensive crops such as rice, jute and sugarcane and practise aquaculture in the freshwater bodies.
Q.3: Answer the following questions in about 150 words. (i) What are the different types of environmental problems of land resources in India? (ii) What are the important strategies for agricultural development followed in the post- independence period in India?
Ans : (i) The different types of environmental problems of land resources in India are:
- Alkalisation of soils: The bad irrigation practices made the soil less productive such as irrigation through hard water with a high lime content degrade the fertility of soil.
- Salinisation of soils: The accumulation of salts in soil leads to degradation of soils and vegetation. It occurs due to less precipitation, prolonged wetness and poor drainage system.
- Waterlogging: Waterlogging is the lowering in land productivity through the rise in groundwater close to the soil surface. It is caused due to poor irrigation system.
- Use of Chemicals: Excessive use of chemicals such as insecticides and pesticides has led to their concentration in toxic amounts in the soil profile.
- Soil erosion: Soil erosion removes topsoil which is fertile layer of soil. Rainfed areas in humid and semi-arid tropics also experience degradation of several types like soil erosion by water and wind erosion which are often induced by human activities.
- After Independence, the immediate goal of the Government was to increase foodgrains production by (a) switching over from cash crops to food crops (b) intensification of cropping over already cultivated land (c) increasing cultivated area by bringing cultivable and fallow land under plough.
- Initially, this strategy helped in increasing foodgrains production. But agricultural production stagnated during late 1950s.
- New seed varieties of wheat (Mexico) and rice (Philippines) known as high yielding varieties (HYVs) were available for cultivation by mid-1960s. India introduced package technology comprising HYVs, along with chemical fertilizers in irrigated areas of Punjab, Haryana, Western Uttar Pradesh, Andhra Pradesh and Gujarat.
- This strategy of agricultural development paid dividends instantly and increased the foodgrains production at very fast rate. This spurt of agricultural growth came to be known as Green Revolution'.
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