Black soil of India is highly suited for the production of:

• Cotton crop
• Paddy crop
• Sugarcane crop
• Wheat crop

Which one of the following agriculture practices is eco-friendly?

• Cultivation of high yielding varieties
• Growing plants in glass houses
• Shifting cultivation
• Organic farming

Calcium ammonium nitrate (CAN) is a popular nitrogen fertilizer because it is:

• slow supplier of nitrogen
• having more percentage of nitrogen in it
• fixing the nitrogen in the soil
• capable of making the soil acidic

Mulching, an agronomic measure of soil conservation, is very effective because it:
1. protects soil from gully erosion
2. protects soil from sheetwash and wind erosion
3. helps soil to retain moisture and nutrients
Select the correct answer using the code given below.

• 1 only
• 1 and 2 only
• 2 and 3 only
• 1, 2 and 3

Leaves of which of the following plants are not used for the rearing of silkworms?

• Mulberry
• Castor
• Oak
• Teak

Which one of the following statements is not correct?

• Application of lime makes the soil acidic
• High acidity in soil is typical of humid climate
• Increasing soil acidity results in declining soil fertility
• Arid climate is characterized by alkaline soil

Which of the following statements relating to Indian agriculture is/are correct ?
1. India has the World’s largest cropped area.
2. Cropping pattern is dominated by cereal crop.
3. The average size of an Indian farm holding is too small for several agricultural operations.
Select the correct answer using the code given below :

• 1 only
• 1 and 2 only
• 2 and 3 only
• 1, 2 and 3

In soil, water that, is readily available to plant roots is:

• gravitational water
• capillary water
• hygroscopic water
• bound water

Red soil colour is caused by:

• aluminium compounds
• mercury compounds
• iron compound
• clay

Leaching is the maximum in the soil type of:

• Laterite
• Red
• Regur
• Desert