Soil improvers and growing media - Determination of nitrogen - Part 1: Modified Kjeldahl method

Comment end date 2025-12-30

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Project stage codes

1. Decision on WI Proposal

2. Projektas

3. Viešoji apklausa

From 2025-10-31 till 2025-12-30

4. Closure of enquiry

5. Submission to Formal Vote

Organisation

CEN Europos standartizacijos komitetas

ICS

65.080 - Fertilizers

Technical Committee

TK 57 Fertilizers

ForeignTC'S

CEN/TC 223

Number of comments

Comment start date

2025-10-31

Scope

This European Standard specifies a method for the determination of nitrogen in soil improvers and growing media. The Kjeldahl method determines ammonium-N, nitrate-N, nitrite-N and organic N content of soil improvers and growing media. Nitrogen in N-N-linkages, N-O-linkages and some heterocyclics (especially pyridine) is only partially determined. [6], [7], [8] The method is not applicable to liming materials and preformed materials such as mineral wool slabs and foam slabs. NOTE The requirements of the standard may differ from the national legal requirements for the declaration of the products concerned.

Relations

Pakeis

prEN 13654-1