Green Manure as a component of Nutrient

Management (INM) 

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Introduction

Green manure as a component of INM

• Green manuring crop such as Dhaincha (Sesbania spp.) sunhemp (Crotalaria juncea), etc. can be grown before the rice season.

•These crops provide sufficient quantity of nitrogen. Green manure helps in increasing apparent use efficiency of K when combined with 50% of the recommended doze of NPK.

•It also has residual effect on the next crop and minimize the adverse effects of AI3+ and /or Fe 2+ in acidic lateritic soils through the chelation of these ions by organic molecules liberated from FYM in the course of mineralization.

•They provide sufficient quantity of organic matter which in turn helps in development of good soil structure.

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Green manure improves nutrient use efficiency in various ways :

• Green manuring through Sesbania aculeata is equivalent to 60 kg inorganic N/ha.

•Incorporation of mungbean after picking pods results in savings of 60 kg inorganic N/ha for the rice crop•Alley cropping to Leucaena leucocephala, Gliricidia sepium and Acacia mangium can provide 100-300 kg N/ha per year•Pruning of Sesbania rostrata planted as hedgerows provides 3-4 t/ha dry matter after decomposition, it releases an average of 70 kg N/ha

Green manure as a component of INM

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Besides above, green manure helps in

•Increasing apparent use efficiency of K when combined

with 50% of the recommended NPK.

•Having residual effect on the next crop.

•Minimizing the adverse effects of AI3+ and /or Fe 2+ in

acidic lateritic soils through the chelation of these ions

by organic molecules liberated from FYM in the course

of mineralization.

Green manure as a component of INM

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Use of green manure in crop rotation before

transplanting rice.•Supplements about 50% of the total N requirement of rice

•Provides about 75-100 % of the crop’s requirement in the case of

rain fed lowlands when the requirement for N is relatively low (60-

80 kg N/ha).

•Has a mobilizing effect on PK and micronutrients in the soil.

•Reduces the leaching and gaseous losses of N, thus increasing

the efficiency of applied plant nutrients.

•Can skip the P allocation to rice when 30 kg P2O5/ha is applied to

the green manure crop.

Green manure as a component of INM

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It is quite interesting that incorporation of crop residues before rice

* Provides 20-25 kg N/ha * Improves the soil organic

matter.* Improves physico-chemical

and biological condition of the soil

Inclusion of grain/fodder/legume crops in crop rotation helps in :

Contributing as much as 50-60 kg N/ha to the succeeding crop of rice

Contributing about 60 kg N/ha when whole plant of mungbean is incorporated into the soil after picking the pods in the summer season

Green manure as a component of INM

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Grow green manuring crops such

as Dhaincha (Sesbania spp.)

sunhemp (Crotalaria juncea),

etc.,before the rice season.

Green Manure cropGreen Manure crop Acacia mangium and Sesbania rostrata as hedgerows in

alley.

Before transplanting the rice crop, incorporate whole

plants of leguminous crop grown in summer (such as

greengram, blackgram and cowpea) after picking the

pods.

Green manure as a component of INM

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How INM brings happiness? INM brings happiness to the farmers by producing

high yield and keeping soil in good health condition.

Green manure as a component of INM

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