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Manure is an organic substance obtained from:

ADecomposed wastes
BFactory chemicals
CCrushed rock salts
DRiver silt beds
Answer & Solution
Correct answer: A. Decomposed wastes
1. Plant and animal waste rots in pits. 2. Microbes decompose it into manure. 3. Fertilisers, by contrast, are factory chemicals. _Source: syllabus Science, Chapter 1, Crop Production and Management._
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