DIN 19684-9:1977 農(nóng)業(yè)水利工程中土壤研究方法.化學(xué)實(shí)驗(yàn)室試驗(yàn).土壤中損害植物的硫化物和多硫化合物的測(cè)定
Methods of soil investigations for agricultural engineering; chemical laboratory tests, determination of the plant detrimental sulphides and poly sulphides in the soil