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What is the purpose of green manure?

Answer and explanation

Correct answer: To increase organic matter in soil

The direct answer is option A: the purpose is to increase organic matter in soil. Green manure is made by growing a green crop and incorporating its fresh plant material into the field. Step by step, the material is mixed into soil; microorganisms decompose it; decomposition adds organic matter and can release useful nutrients; soil structure, moisture retention, and fertility may improve. This helps a later crop, although the exact benefit depends on the plant, soil, and management. Option A is correct because it states the central purpose. Option B is wrong because green manure should improve soil, not turn a field into stone. Option C is wrong because it is not a method for throwing away seeds; seeds may be used to grow the green-manure crop. Option D is wrong because colouring grain has no connection with soil enrichment. Do not confuse green manure with chemical fertiliser: it is plant material used naturally or biologically to improve the soil. Memory cue: green plant goes into soil, soil becomes richer.

Related tags

Green-ManureSoil-FertilityOrganic-Farming

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