Answer:
(i)
Vermicompost is a manure rich in pulverized organic matter and nutrients. The
compost prepared by using earthworms to hasten the process decomposition of
plants and animals refuse. (1)
(ii) Green manure is prepared by decomposing green plants in field
itself. It helps in enriching the soil in nitrogen and phosphorus.
Example Sunhemp is grown in fields, mulched by ploughing
and allowed to decompose in field for the preparation of green manure. (1)
(iii) Biofertiliser are living organism used as fertilizer
to supply the nutrients to crop plants. Example, Nitrogen fixing blue green
algae, nitrogen fixing bacteria which fix nitrogen in soil, rice fields, are called
as bioferriliser. (1)
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