Q. Irrigation accounts for about two thirds of world

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Q. Irrigation usually occurs through

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Q. Extensive deforestation can lead to large changes in

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Q. Almost, 60 percent water lost through evaporation and

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Q. In which country average precipitation is reduced to less than 1mm per day?

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Q. Desertification' in drylands is degradation of

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Q. Desert covers about 40%t of total land area of How much area does a desert cover?

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Q. Areas with low precipitation is known as:

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Q. How much agricultural land irrigated in California?

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Q. Amount of runoff is highly sensitive to changes in

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Q. Microirrigation techniques provides a large opportunity for'

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Q. In regions of less precipitation, there will be less water availibity at the

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Q. Runoff in rivers and streams, left over from the

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Q. United Nations Convention to 'Combat Desertification' was set up in

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Q. In Peru rice, cotton, and crops, depends on amount of:

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Q. Higher CO₂ concentration stimulates:

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Q. According to experimental research, grain and forage quality reduces, with an increased CO₂ concentration at:

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Q. Increase CO₂ concentration enabling plants to fix carbon at a:

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Q. In mid of 1960s and 1980s, global food production increased by:

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Q. Rice requires a large amount of

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