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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