Question

what is green revolution write its merits and demerits

Answer 1

The term Green Revolution refers to the renovation of agricultural practices beginning in Mexico in the 1940s. Because of its success in producing more agricultural products there, Green Revolution technologies spread worldwide in the 1950s and 1960s, significantly increasing the amount of crops and their quality. It provides with high yielding variety of seeds and modern technology to practice agriculture.

 
Merits

The spread of green revolution technology enabled our economy to achieve self-sufficiency in food grains. Enormous increase in the production of food grains through the use of high yielding variety seeds for wheat and rice.
A proportion of food grains were sold in the market which leads to decline in the price level of food grains compared to other consumption. Low income groups were benefited from the given price level. It enabled the government to procure required amount of food grains to build a stock which will be used at times of shortage.
The government provided loan to small farmers to purchase the necessary inputs for the new technology. The risk of the small farmers being solved, when pest attack their crops was protected by the services of the research institute. Green revolution benefited the small as well as rich farmers.
Demerit

The farmers require reliable irrigation facilities and financial support to consume fertiliser and pesticides.
The rapidly increasing problems of land degradation, deforestation, environmental pollution, depletion of biodiversity, increased incidence of mosquito borne diseases, pest resurgence, lowering of ground water table are the results of Green revolution in India.
Soil erosion which is the removal of the top soil cover is the result of Green revolution.

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Answer 2

Hello friend here is your answer. Green Revolution refers to the research that was done in the late 1950 s or 1960 that increased the agricultural production in the whole world by using the high yield variety seeds also called HYV seeds,proper irrigation,machinery fertilisers and manures.  Merits of Green Revolution It helped in increase of yield of food grains. It also helped in good production of seeds than before. Also,these kinds of seeds needed plenty of water.  Demerits Increase in fertilizer resulted in pollution of water bodies also it made soil less fertile.