Question

In view of the current food crisis, it is said, that we need another green revolution. Highlight the major limitations of the earlier green revolution.

Answer 1

Limitations of the green revolution:

1. The Green Revolution succeeded in tripling the food supply but yet it was not enough to feed the growing human population. Increased yields have partly been due to the use of improved crop varieties, but mainly due to the use of better management practices and use of agrochemicals (fertilisers and pesticides). However, for farmers in the developing world, agrochemicals are often too expensive, and further increases in yield with existing varieties are not possible using conventional breeding.
2. Use of agrochemicals causes eutrophication in aquatic ecosystems and biomagnification in terrestrial ecosystems. 
3. Water logging and soil salinity are some of the problems that have come in the wake of green revolution.