Bsc horticulture

1. Green manure
To prepare green manure, legumes like dhancha, guar,
sanai, mung, etc. are decomposed in the field. At the
time of decomposing in the field of green manure,
organic acids are produced due to which pH of soil is
decreases and nutrients are readily available. This
increases the productivity of the land.
The roots of these crops exploit the nutrients contained
on the lower surfaces of the soil. Which come in the
upper part of the soil and these nutrients become
readily available to the next crop.
It is noteworthy that the nutrient content in the upper
surfaces low due to intensive farming.
Apart from this, green manure increases the ability to
water holding in the land.

2. Green manuring
Chemical, biological fertility and physical
properties
Nutrients
Exchange capacity of soil
Water holding capacity of soil
Aeration of soil
Increase fertilizer use efficiency –C:N ratio
High
Use do not affect our environment

3. Symbiotic
Leguminous plant + Rhizobium
Blue-green algae and water fern (Azolla)
in rice fields
Free living nitrogen fixing bacteria such as
Azotobacter, Azospirillum, Azolla,
bluegreen algae etc.

5. MH421 SML668

8. Green Manure Age Dry matter N accumulation
days (t/ha) Kg/ha
____________________________________________
Dhaincha 45-60 2.5 to 5.0 53 to 133
Cowpea 50-60 4.4 to 6.9 74-113
Sunhemp 60 4.6 to 5.4 78-110
Clusterbean 49 3.2 91
Moongbean 48 1.8 34

9. For green manuring sow dhaincha using
10-12 kg seed/acre by first week of May
and incorporate it into the soil
Disease, insects and nematodes may
come up due to improper decomposition