Any tillage and planting system that maintains at least 30% of the soil surface covered by residue after planting for the purpose of reducing soil erosion by water:
Correct answer: B. Conservation Tillage
- A. Deep Tillage
- B. Conservation Tillage
- C. Both a & b
- D. None of these
Explanation
Conservation tillage includes systems that leave at least 30% residue cover after planting to reduce water erosion and runoff. Deep tillage normally disturbs and exposes more soil, so it is not defined by this residue threshold.
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