oSIST prEN 17729:2026

SLOVENSKI STANDARD
01-januar-2026
Izboljševalci tal in rastni substrati - Metode za določanje suhe snovi, količine,
bakra, cinka, klorida, dušika, P2O5 in K2O
Soil improvers - Methods for the determination of the dry matter, quantity, copper, zinc,
chloride, nitrogen, P2O5 and K2O content
Bodenverbesserungsmittel - Bestimmung spezifischer Parameter
Amendements du sol - Vue d'ensemble des méthodes pour la détermination de la
matière sèche, de la quantité, du cuivre, du zinc, des chlorures, de l'azote, et de la
teneure en P2O5 et K2O
Ta slovenski standard je istoveten z: prEN 17729
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2025
ICS Will supersede CEN/TS 17729:2022
English Version
Soil improvers - Methods for the determination of the dry
matter, quantity, copper, zinc, chloride, nitrogen, P2O5 and
K2O content
Amendements du sol - Vue d'ensemble des méthodes Bodenverbesserungsmittel - Bestimmung spezifischer
pour la détermination de la matière sèche, de la Parameter
quantité, du cuivre, du zinc, des chlorures, de l'azote, et
de la teneure en P2O5 et K2O
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 223.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17729:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Sampling and sample preparation . 6
4.1 Sampling . 6
4.2 Sample preparation for chemical and physical tests . 6
5 Determination . 6
5.1 Determination of the dry matter content . 6
5.2 Determination of the nitrogen content . 6
5.2.1 Modified Kjeldahl method . 6
5.2.2 Dumas method . 6
5.3 Determination of the aqua regia soluble P O and K O content . 6
2 5 2
5.4 Determination of the copper and zinc content . 6
5.5 Determination of quantity . 7
5.5.1 Determination of quantity for materials up a particle size up to 60 mm . 7
5.5.2 Determination of quantity (indicated by volume or mass) for materials up a particle
size greater than 60 mm . 7
5.6 Determination of the chloride content . 7
Annex ZA (informative) Relationship of this European Standard and the essential
requirements of Regulation (EU) 2019/1009 making available on the market of EU
fertilising products aimed to be covered . 8
Bibliography . 9

European foreword
This document (prEN 17729:2025) has been prepared by Technical Committee CEN/TC 223 “Soil
improvers and growing media”, the secretariat of which is held by NEN.
This document is currently submitted to the CEN enquiry.
This document will supersede CEN/TS 17729:2022.
This document includes the following significant technical changes with respect to CEN/TS 17729:2022:
— The title has been revised;
— The quantity requirements have been added to the Introduction;
— An applicability statement has been included in the Scope;
— Clause 2, Normative references, has been updated;
— Annex ZA has been added.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Introduction
Different product functions warrant different product safety, quality and quantity requirements adapted
to their different intended uses. EU fertilizing products have therefore been divided into different product
function categories (PFCs), which are subject to specific safety, quality and quantity requirements, as
specified in the Regulation (EU) 2019/1009 [1].
Soil improvers have been classified as PFC 3. The specific safety, quality and quantity requirements in
relation to specific parameters are specified in this document, as well as normative references of the test
methods to be used to assess the compliance with the related requirement.
---------------------- Pa
...