The softer, friable part of land; soil, especially productive soil.

泥软且易碎的陆地部分；泥土，尤指肥沃的泥土。

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Two grades of yearly input of organic fertilizer has been suggested for the organic matter balance of medium or low productive soil respectively.

提出了中、低产田在各保持两个量级有机质平衡对，每年应投入各有机物料的数量。

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Soil organic carbon is a key indicator of how well soil will hold moisture, provide nutrients, and remain productive.

土壤中的有机碳是土壤是否能够保持湿度，提供营养和维持生产能力的重要指标。

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But Mr.Singh says for a productive dialogue, it is vital for Pakistan to destroy militant groups, their camps and infrastructure on its soil.

VOA: standard.2009.10.28

Cook and Trott's partnership was the most productive by an England pairing on Australian soil and the best by any duo in Brisbane, beating the 307 produced by Mike Hussey and Brad Haddin earlier in the same match.

BBC: Ashes: England break records in draw with Australia