What changes in agriculture led to …

The changes that occurred due to the Green Revolution in India are as follows
(i) The use of advanced technology in agriculture implying use of High Yield Variety (HYV) seeds, chemical fertilisers and pesticides and a well developed system of irrigation led to a substantial increase in the production of food grains, mainly wheat and rice.
(ii) It resulted in higher income growth. Even poor farmers who practised modern farming with advanced technology started becoming rich.
(iii) It led to commercialisation of agriculture as farmers started cultivating flowers, cotton, tobacco etc.

Economic factors such as subsidies, commodity prices, labour and immigration laws, cost of land, transport, capital and markets, etc. affect farming. Climatic factors such as light, water and rainfall, temperature, air, relative humidity and wind also affect farming. The introduction of technical changes through improved seed, fertilizer, irrigation, mechanization, and plant protection have brought dramatic changes in agricultural production since the 1950s. Global demand and consumption of agricultural crops for food, feed, and fuel is increasing at a rapid pace. ... This dramatic yield improvement is due to the development and widespread use of new farming technologies such as hybrid corn, synthetic fertilizers, and farm machinery.