Question

State the role of green manure in agriculture.

Answer 1

green manures help in sustainable agriculture system
some green manures also fix nitrogen in soil from atmosphere

Answer 2

The main benefit of using green manure for organic farmers (and other farmers) is that adding organic matter to the soil releases important plant nutrients, such as nitrogen, potassium and phosphorous, plus trace minerals that come from the decomposing organic matter after you dig the crop into the soil. All of these nutrients help to increase crop yields. Other benefits include improved soil condition, decreased weeds, increased water-holding capacity and decreased soil loss via erosion. The green manure treatment can dramatically improve poor soils, and it is excellent for maintaining already healthy soil.