Question

what is the main reason for land degradation in middle India

Answer 1

Land degradation is categorized into three types i.e. (i) Physical degradation (ii) Biological degradation (iii) Chemical degradation. Physical degradation refers to deterioration in physical properties of soil whereas biological degradation refers to reduction in soil organic matter, decline in biomass carbon and decrease in activity and diversity of soil fauna. Chemical degradation is basically due to the nutrient depletion.
Extent of land degradation:

Degraded land includes eroded lands, saline / alkaline lands, water logged lands and mined lands. The total land area of India is 329 million hectares of which about 178 million hectares (54%) is converted into wastelands for one or other reasons. This also includes about 40 million hectares of degraded forest. The total cultivable land of the country is about 144 million hectares of which 56% (80.6 million hectares) is degraded due to faulty agricultural practices and the dense forest cover has been reduced to 11% (36.2 million hectares) of the total geographical area. Watershed areas, river corridors and rangelands have been extensively disturbed. Situation is frequently so bad that even cessation of abuse may no longer lead to self restoration of biological diversity, stability and productivity of the ecosystems.

Answer 2

over grazing
rain not come properly
excess use of polythene
soil pollution