美国土壤系统分类单元 —— 土纲简介 (USDA ， 1998)

Nov 05, 2014

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美国土壤系统分类单元 —— 土纲简介 (USDA ， 1998). 上述资料引自 : USDA, Keys to Soil Taxonomy, Eighth Edition, 1998. Malcolm E Sumner,《Handbook of Soil Science》, Boca Raton, CRC Press, 2000.

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美国土壤系统分类单元 —— 土纲简介 (USDA ， 1998)

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