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Growing legumes one season and wheat the next replenishes soil nitrogen. This practice is:

AMixed cropping
BShifting farming
CTerrace farming
DCrop rotation
Answer & Solution
Correct answer: D. Crop rotation
1. Rhizobium in legume roots fixes nitrogen. 2. Alternating crops is crop rotation. 3. Northern farmers grew legume fodder then wheat. _Source: syllabus Science, Chapter 1, Crop Production and Management._
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