Green manuring involves growing specific crops and ploughing them into the soil to enhance nitrogen and nutrient content, improving soil structure and fertility. Key crops used for green manuring include sunnhemp, cowpea, and berseem, each contributing significantly to nitrogen fixation. This practice not only addresses nutrient deficiencies but also aids in increasing the availability of essential macro and micronutrients in the soil.

1. Presentation on:
Green Manuring

2. What is green manuring ?
– Green manuring Is defined as the growing of
green manure crops and then turning off these
crops directly in the field by ploughing the field so
as to make the field richer In nitrogen which is
most deficient nutrient of the soil

3. Advantages of green manuring
– It will lead in building the soil structure and improving the soil physical
properties like soil aeration, water holding capacity of soil, soil bulk density
– This will also help in bringing the nutrient into the upper layer so that they
should become available for the plant absorption from the lower layer

4. Advantages of green
manuring(cont. …)
– Green manuring also fulfils the crop need of nitrogen
which is the most deficient nutrient in the soil these
days
– It will also increase the soil availability of different micro
and macro nutrient like those of calcium , phosphorus,
potash and magnesium

5. Green manuring crops
– There following crops are the manuring crops
which are explained

6. • Crotolaria joncea(sunnhemp)
– It is a green manuring crop with vigorous cropping
habits. And it does not with stand the waterlogging
– Its seed rate is 25-30 kg per hectare
– It is incorporated into the soil after the period of 9 or 10
weeks of sowing

7. Green manuring crops(cont.…)
– The quantity of nitrogen fixed by this crop is very good for i.e. 80 to 130 k.g/ha
– It contains about 2.80 to 3.15 % nitrogen content

9. Cassia pistula
– It is weed which is used for green manuring
– It contains 0.75 to 1.25% nitrogen contents in it
– Its stems and leaves are used for green manuring
when the plant is in the flowering stage

11. Cowpea or vigna sinensis
– It fixes about 200 kg nitrogen per hectare in the soil due
to symbiotic nitrogen fixation by rhizobium

13. Green gram or vigna radiata
– It fixes about 25 kg nitrogen per hectare in the soil which
very high in regards that you can also obtain a good
production of a green gram as well

15. Berseem or trifoilium
alexandrinum
– The fodder crop of Berseem fixes abou 280 to 350 kg nitrogen per hectare
– Some of the other legume green manuring crops are soybean, alfa-alfa ,
clusterbean which also fixes effective nitrogen from the atmosphere into the
soil by the process of symbiotic nitrogen fixation by a bacterium named
rhizobium