Define (i) Vermicompost (ii) Green manure (iii) Bio fertilizer

A.VERIFIED ANSWERfact-checked by tutors

Vermicompost:

Manure which is rich is organic materials. Vermicompost is prepared by using earthworms, plant and animal waste. Earthworms helps in composting organic waste to give a nutrient rich manure.

Green Manure:

Manure prepared by composting green plant is known as green. Green manure is usually made in the field Ex: Hemp is allowed to decompose to get green manure.

Bio-fertilizers:

Usage of living organisms to provide nutrient to plant and to make soil fertile is known as bio fertilizers. Ex: Blue green algae used as bio-fertilizer in paddy fields.

Suggested Q&A

SCIENCE · CLASS 9

ScienceCLASS 9
1. Why does the temperature of a substance remain constant during its melting point or boiling point?
ScienceCLASS 9
Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous solution decreases with increase in humidity. Sponge though compressible is a solid.
ScienceCLASS 9
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
ScienceCLASS 9
It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?
ScienceCLASS 9
Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment
ScienceCLASS 9
Water as ice has a cooling effect, whereas water as steam may cause severe burns. Explain these observations.