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N ploughing following the contours of the land, to minimize the effects of erosion 等高耕作法
contour plowing , contour farming
Reasonable agronomic management practices can conserve black soils from erosion and regain black soil fertility, including contour ploughing and conservation tillage.
合理的农业管理措施，如等高耕作和保护性耕作可以在很大程度上控制黑土侵蚀，保持和恢复黑土肥力。
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