首页> 外文OA文献 >Studies on the Changes of Soils' Properties of Upland or Paddy Fields with various Productivities. : Part. 9. On nitrogen and carbon contents of humic acids extracted from a series of volcanic ash upland field's top-soils of the four groups and on the ext
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Studies on the Changes of Soils' Properties of Upland or Paddy Fields with various Productivities. : Part. 9. On nitrogen and carbon contents of humic acids extracted from a series of volcanic ash upland field's top-soils of the four groups and on the ext

机译:不同生产力的旱地或稻田土壤性质变化的研究:第9部分。从四组火山灰高地土壤中提取的腐殖酸的氮和碳含量以及对

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