• 1. soil bulk density: 土壤容重 | 土壤颗粒密度
• 2. Reduce soil bulk density: 降低土壤容重
• 3. upper soil bulk density: 上层密度

更多释义

• 1.Maize straw returning to the field also decreased soil bulk density.
  秸秆还田还降低了土壤容重。
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• 2.So the effect of plant roots should be considered in the calculation of soil bulk density.
  在土壤容重计算过程中，应考虑植物根系的作用。
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• 3.The vertical transport of nitrate-N was also affected by the soil bulk density and the organic matter content.
  土壤容重和有机质含量对硝态氮的垂直运移有很大的影响；
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