NEET BIOLOGY

Detailed explanation-1: -Desertification is a form of land degradation by which fertile land becomes desert.

Detailed explanation-2: -Desertification decreases the water holding capacity of the soil, as the soil turns into a desert, thus, losing its water holding capacity. The water holding capacity of the soil increases with the supplementation of organic matter to the soil and by growing more trees.

Detailed explanation-3: -Human activities that contribute to desertification include the expansion and intensive use of agricultural lands, poor irrigation practices, deforestation, and overgrazing.

Detailed explanation-4: -’Climatic variations’ and ‘Human activities’ can be regarded as the two main causes of desertification. removal of the natural vegetation coverby taking too much fuel wood, agricultural activities in the vulnerable ecosystems of arid and semi-arid areas, which are thus strained beyond their capacity.