Question
Why earthworm is called the friend of farmer?
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Answer
Earthworm is called the friend of farmer because it helps in making the soil loose and porous by burrowing, which in turn causes aeration and absorption of water by soil and thus, helps in respiration and penetration of the developing plant roots. Earthworms are also used in vermin composting as worm castings are used as manure and increases soil fertility. Nitrogenous wastes of earthworms are used as plant food and they help in creating optimum conditions for plant growth by reducing acidity and alkalinity of soil.
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