NF X31-506-1992 Soil quality - Physical methods - Assessment of the structural stability of a soil《土壤质量 物理方法啊- 土壤结构稳定性的评定》.pdf

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DIN 19682-10-2014 Soil quality - Field tests - Part 10 Description and evaluation of soil structure《土质 野外试验 第10部分 土壤结构的描叙和评估》.pdf

DB15 T 1233-2017 半干旱区土壤结构调理剂-PAM施用技术规程.pdf

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