Green manuring is an agricultural practice that involves growing and incorporating green, actively growing plants into the soil to improve its fertility and structure. This sustainable and eco-friendly technique harnesses the natural processes of nitrogen fixation, nutrient cycling, and organic matter addition to enhance soil health. Here's a description highlighting the key aspects of green manuring:
"Green manuring is a forward-thinking agricultural strategy that embraces the power of nature to cultivate healthier and more productive soils. In this practice, cover crops, often chosen for their ability to fix nitrogen and accumulate essential nutrients, are intentionally grown and then plowed back into the soil while still green and succulent. This process not only adds valuable organic matter but also enhances microbial activity, fostering a dynamic soil ecosystem.
By incorporating green manure crops into the rotation, farmers can effectively suppress weeds, improve water retention, and break disease cycles. Furthermore, the nitrogen-fixing capability of certain cover crops contributes to enhanced soil fertility, reducing the dependence on synthetic fertilizers. This approach aligns with sustainable agriculture principles, promoting long-term soil resilience and minimizing environmental impact.
Green manuring stands as a testament to the synergy between agricultural practices and ecological balance, offering a natural and holistic solution for maintaining and improving soil health. As a cost-effective and environmentally friendly method, it underscores the importance of a harmonious relationship between farming and nature in fostering sustainable and resilient agricultural systems."
Principle of erosion control- Introduction to contouring,strip cropping,conto...
green manuring ppt.pptx
1.
2. MVPS KDSP COLLEGE OF
AGRICULTURE , NASHIK
PRESENTED BY – Temgire Shubham Annasaheb
ROLL NO – AN 110/2017
MODULE INCHARGE – Prof. N.B. Shinde
PRESENTED TO – Dr. T.D. Patil
CENTRE – K.D.S.P. COA, Nashik
3. Introdution
Green manuring is a part of
organic farming which can be
defined as “the practice of
enriching the soil fertility by
ploughing under or soil
incorporation of any green
manure crops while they are
green or soon after they start
flowering.
4. Green manuring is considered
to be a good management
practice in all agricultural
production systems because of
its increasing sustainability of
cropping system through
reducing soil erosion.
The crops that are grown for
green manure are called green
manure crops.
5. WHAT IS GREEN MANURE?
Green manure refers to “a plant
material incorporated with the soil
while green or soon after maturity for
improving the soil to supply
nutrients, particularly N, to a
standing crop”.
WHAT IS GREEN MANURING?
Green manuring is a practice of
ploughing or burying the undeco-
mposed green plant tissues into the
soil for improving structure and
fertility of the soil.
6. Green manuring contributes 40 to 80 kg nitrogen
per ha.
Besides supplying nitrogen, it prevents loss of
nitrogen by leaching and erosion.
Vigorous root system of green manure keeps the
soil particles bound together.
Green manure reclaims saline and alkaline soils.
Some green leaf manure crops serve as fodder.
The growth of green manure crops is very fast.
7. Green leaf manuring –
It refers to turning into the soil green
leaves and tender green twigs collected from shrubs
and trees grown on field bunds, waste lands and
nearby forest area.
Plant N P K
Gliricidia 2.76 0.28 4.60
Pongamin 3.31 0.44 2.39
Neem 2.83 0.28 0.35
Gulmohar 2.76 0.46 0.50
Peltophorum 2.63 0.37 0.50
10. In-situ green manuring –
When green manure crops are grown
in the field itself either as a pure crop or as intercrop
with the main crop and buried in the same field it is
known as In- situ green manuring.
Plant N P K
Sunhemp 2.30 0.50 1.80
Dhaincha 3.50 0.60 1.20
Sesbania 2.71 0.53 2.21
Cowpea 1.70 0.28 1.25
Mungbean 2.21 0.26 1.26
13. Multipurpose.
Short duration as well as fast growing .
High nutrient accumulation ability.
Tolerance for adverse climatic condition.
High water use efficiency .
High seed production.
Long seed viability .
Ease in incorporation
Pest and disease resistant.
Deep root system.
High biomass production .
Wider ecological adoptability.
14. Green manures add organic matter to
the soil and simulates activity of soil
microorganisms.
Green manures improve the structure
of the soil thereby improving WHC,
decreasing run off and erosion.
Green manures take nutrients from
lower layers of the soil and adds to the
upper layer of soil.
15. Green manures increase the
availability of certain plant nutrients
like NPK.
Green manures improves soil
structure and soil tilth.it also
improves areation in rice soils by
stimulating the activities of surface
film of algae and bacteria.
Green manuring increases the yield
of crops to an extent of 15-20% as
compared to non green manuring
fields.
16. Under rain fed conditions, the
germination and growth of
succeeding crop may be affected
due to depletion of moisture for
the growth and decomposition of
green manuring.
Green manuring crops inclusive of
decomposition period occupies
the field least 75-80 days which
means a loss of one crop.
17. Incidence of pests and diseases may
increases if the green manuring is
not kept free from them.
A green manure crop may compete
for time, labour and water, the cost
of which must be balanced against
the cost of inorganic fertilizers.
Non availability of good quality
seeds restrict raising of green
manure crops.
18. Green manure crop should be incorporated into soil
at proper age of crop to get maximum benefit. It
should be turned into soil at flowering stage, which
is about 7-8 weeks after sowing.
Dhaincha attain maximum growth about 8 weeks
after sowing, while sun hemp crop flower aroung 8-
10 weeks after sowing. An 8 week old green manure
crop is succulent enough to be turned into soil for
best response under rice.
19. Various reports conclude that a green manure crop
should be turned under at 7 to 8 week age, which
coincides with flowering and maximum growth stage
for most of the green manure crops.
20. Which green manure crop should be grown (best suited to
the soil and climatic condition)
When should be grown (time of sowing)
At what stage it should be buried (time/stage to turned
into soil)
What should be the time lag between the burying of the
green manure crop and the sowing of the next crop (to
allow decomposition)
21.
22. Cost of 1 soil sample-
No. Nutrient/componen
t
Expenditure
1 pH 7.5
2 EC 1.25
3 Organic Carbon% 50
4 CaCO3 68
5 Nitrogen 40.2
6 Phosphorus 12
7 Potassium 3
8 Other charges 5
9 Labour charges 50
Total 236.95
23. Cost charges from farmers- 300 Rs./sample.
Total expenditure- 236.95 Rs./sample.
Net profit- Gross income-Total expenditure
= 300-236.95
= Rs.63.05
BC ratio = present value of gross income ÷ Total
expenditure
= 300 ÷ 236.95
= 1.26
