GENERAL KNOWLEDGE

Detailed explanation-1: -The arid zone is characterized by excessive heat and inadequate, variable precipitation; however, contrasts in climate occur. In general, these climatic contrasts result from differences in temperature, the season in which rain falls, and in the degree of aridity.

Detailed explanation-2: -Agriculture in arid lands is largely confined to grazing by livestock, and even much of the land in semiarid regions is used only for grazing. Therefore, agriculture in dryland regions is far greater, particularly in terms of area, than dryland farming.

Detailed explanation-3: -These soils are very infertile, but with proper fertilizers and irrigation, the drought resistant and salt tolerant dry crops such as barley, cotton, wheat, millets, maize, pulses, etc., can be grown.