以下为句子列表：
英文: And it is in spring that soil water content, soil organic matter and calcium and magnesium suffered more seriously damage from overgrazing.
中文: 春季过度放牧对土壤表层的水分、有机质和钙、镁等元素造成的损失最为严重。
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英文: Examples of how intensified cropping systems improve plant nutrition, increase water use efficiency, increase nutrient use efficiency and build soil organic matter are discussed.
中文: 讨论了集约种植制度和如何改善植物营养、提高水分利用率、提高养分利用率和积累土壤有机质的实例。
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英文: When nutrients have been depleted, addition of adequate fertilizers can reverse the trend of soil organic matter depletion.
中文: 养分耗竭后，施用足量肥料能逆转土壤有机质耗竭的趋势。
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英文: in the fourth year, the increments of soil organic matter in tilling layer for each manure level were 9.7%, .0% and 0.% respectively.
中文: 第年各施肥水平下的耕层土壤有机质增加量分别为9.7%、.0%和0.%;
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