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ISO 11261:1995 Soil quality - Determination of total nitrogen - Modified Kjeldahl method
standard by International Organization for Standardization, 03/01/1995
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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.