• arable layer - 引用次数：9

  The average value is 15.45cm. There are 49.09%soil samples which the depth of arable layer is less 15cm.

  研究区耕层厚度在7.5～25cm之间,平均厚度为15.45cm,耕层厚度小于15cm的土样占49.09%。

  参考来源 - 典型耕地棕壤肥力状况及变化趋势的研究
• tillage layer - 引用次数：2

  The soil nitrogen and phosphorus content change was limited in tillage layer (20cm) when the nitrogen and phosphorus were basically unchanged between 31-50cm. this experiment was one term experiment and its conclusion had to be validated by afterwards experiments.

  4农田处理畜禽粪便土壤的氮磷含量的变化只限于耕层(20cm)，31-50cm土层的氮磷含量基本不变，本实验是当季实验，这个结论还有待后续实验验证。

  参考来源 - 农田作物处理规模化养殖场粪便的能力及二次污染的分析
• topsoil

·2,447,543篇论文数据，部分数据来源于NoteExpress