规定了测定土壤总氮（铵态氮、硝酸盐氮、亚硝酸盐氮和有机氮）含量的方法。N-N-键、N-O-键和一些杂环化合物（尤其是吡啶）中的氮仅部分测定。适用于所有类型的土壤。

Specifies a method for the determination of the total nitrogen (ammonium-N, nitrate-N, nitrite-N and organic N) content of a soil. Nitrogen in N-N-linkages, N-O-linkages and some heterocyclics (especially pyridine) is only partially determined. Applicable to all types of soils.