Question

Vast tracts of land have become unproductive due to ......

Answer 1

Answer:

due to the floating of the top soil

this can also be said as soil erosion

Answer 2

Vast tracts of land have become unproductive due to intense salinity.

Explanation:

• The significant increase in food production owing to Green Revolution was based on  use of high technology such as  large-scale utilisation of pesticides and chemical fertilizers, extensive irrigation, and better cultivation; however the adverse repercussions  of these farming practices have led to vast tracts of once fertile land becoming alkaline and saline deserts
• Almost 40 per cent of the fertile Indo-Gangetic plain suffers from excessive salinity because of large-scale utilisation of chemical fertilizers, inadequate drainage, and extensive water logging. This has led to vast tracts of land being severely degraded and becoming unproductive