Why, despite the implementation of green revolution, 65 per cent of our population continued to be engaged in the agriculture sector till 1990?

As the economy grows, the occupational structure changes from agriculture sector to manufacturing sector or service sector. With the adoption of green revolution, there was tremendous increase in the food grains production but that growth was mainly restricted to production of wheat and the farmers of Punjab and Haryana. Some growth took place in the production of rice and also some benefits were reaped by the farmers of other states of India but as these 'High Yielding Variety Seeds' require different inputs in definite proportions, the benefits of green revolution were not reaped evenly by the farmers of all states of India.
Consequently, population (farmers) started searching in other areas of manufacturing sector and service sector. Unfortunately, till 1991, both these sectors were unable to absorb wider section of community. Hence, the 65% of the population was forced to remain dependent on agriculture inspite of introduction of green revolution and slow growth of manufacturing and service sector. The relative share of agriculture in GDP declined but dependence of population on agriculture remained to continue till 1990