Question

natural fertiliser made from decomposed plant parts​

Answer 1

Answer:

Manure

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Answer 2

The process of encouraging bacteria to decay the organic matter is called composting. The end result, compost, adds carbon and nitrogen that plants need for growth, plus bacteria and fungi that help them retrieve nutrients from the soil.

By adding earthworms known as vermicomposting

compost and vermicomposting two possible answers

but compost more accurate as u mention not earthworms.

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