green manuring

Rao Bilal Ali2014-ag-4774sec:CSemester:3rd

GREEN MANURING

Green ManuringGREEN MANURING

Manuring

DEFINITION Practice of growing crops (mostly legumes) and ploughing them

under the soil when their tops are green. Example: Legumes are the best green manuring crops.

Why legumes are preferred?

They have ability to fix atmospheric nitrogen into the soil.

What is green manuring?

Green manuring is the practice of growing lush plants on the site into which you want to incorporate organic matter, then turning into the soil while it is still fresh.

The plant material used in this way is called a green manure (GM). Generally the practice of green manuring is adopted in two ways:

a) In-situ green manuring b) Green leaf manuring

Green manuring

Green manuring In this system the short duration legume crops are grown and buried in the same site when they attain the age of 60-80 days after sowing.

This system of on-site nutrient resource generation is most prevalent in northern and southern parts of India where rice is the major crop in the existing cropping systems.

Major Green Manure Crops

Jantar Guara Sesbania Berseem Lucern Sun hemp

jantar

Berseem

Why Green Manuring is Necessary

To add organic matter into the soil. To maintain soil fertility level . To improve the structure of soil. To fix atmospheric nitrogen into the soil.

Criteria For Green Manure Crops

Crop should be of short duration. Vegetative growth rate should be high. Produce more biomass. Rapidly decomposing. Should have Fibrous root system.

Time Of Green Manuring

Mostly practiced in kharif season. High temperature help in rapid decomposition. Six weeks usually required to complete decomposition.

Benefits Of Green Manuring

Increase in organic matter Increase in soil fertility. Reduction of inorganic fertilizer use Increase in food quality Improvement in soil properties Increase in water holding capacity.

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