prEN 17755

Inorganic fertilizers - Determination of specific parameters

This document specifies a reference to the method for the determination of the following specific parameters in inorganic fertilizers:
—   granulometry;
—   organic carbon content;
—   dry matter content.
This document is applicable to the fertilizing products blends where a blend is a mix of at least two of the following components: fertilizers, liming materials, soil improvers, growing media, inhibitors, plant biostimulants, and where the following category: inorganic fertilizers is the highest % in the blend by mass or volume, or in the case of liquid form by dry mass. If inorganic fertilizer is not the highest % in the blend, the European Standard for the highest % of the blend applies. In case a fertilizing product blend is composed of components in equal quantity, the user decides which standard to apply. Variations in analytical methods for fertilizing product blends can lead to differing results as some components or matrix interactions can affect the outcome. Validation procedures have shown that developed standard methods are robust and reliable across diverse product compositions, but possible interferences and unexpected results when analysing fertilizing product blends are possible.

Anorganische Düngemittel - Bestimmung spezifischer Parameter

Dieses Dokument legt einen Verweis auf das Verfahren zur Bestimmung der folgenden spezifischen Parameter in anorganischen Düngemitteln fest:
   Granulometrie;
   Gehalt an organischem Kohlenstoff;
   Trockenmassegehalt.
Dieses Dokument ist anwendbar auf Düngeproduktmischungen, bei denen eine Mischung aus mindestens zwei der folgenden Komponenten besteht: Düngemittel, Kalkdünger, Bodenverbesserungsmittel, Kultursubstrate, Hemmstoffe, Biostimulanzien und wenn die Kategorie „anorganische Düngemittel“ den höchsten Prozentsatz in der Mischung bezüglich Masse oder Volumen, oder im Falle von flüssigen Formen bezüglich Trockenmasse ausmacht. Wenn das anorganische Düngemittel nicht den höchsten Prozentsatz in der Mischung ausmacht, gilt die Europäische Norm für den höchsten Prozentsatz der Mischung. Im Falle, dass die Düngeproduktmischung aus Komponenten gleicher Menge besteht, entscheiden die Anwender, welche Norm angewendet wird. Variationen in analytischen Verfahren für Düngeproduktmischungen können zu unterschiedlichen Ergebnissen führen, da einige Komponenten oder Matrixwechselwirkungen das Ergebnis beeinflussen können. Validierungen haben gezeigt, dass die entwickelten Standardverfahren robust und zuverlässig über unterschiedliche Produktzusammensetzungen hinweg sind. Jedoch sind mögliche Interferenzen und unerwartete Ergebnisse bei der Analyse von Düngeproduktmischungen möglich.

Engrais inorganiques - Détermination des paramètres spécifiques

Le présent document spécifie une référence à la méthode de détermination des paramètres spécifiques suivants dans les engrais inorganiques:
—   la granulométrie;
—   la teneur en carbone organique;
—   la teneur en matière sèche.
Le présent document est applicable aux mélanges de fertilisants constitués d'au moins deux des composants suivants: engrais, amendements minéraux basiques, amendements du sol, supports de culture, inhibiteurs, biostimulants des végétaux, et dans lesquels la catégorie « engrais inorganiques » représente le pourcentage le plus élevé du mélange en masse ou en volume, ou dans le cas d'un liquide, en masse sèche. Si l'engrais inorganique ne représente pas le pourcentage le plus élevé du mélange, la Norme européenne relative au pourcentage le plus élevé du mélange s'applique. Dans le cas où le mélange de fertilisants est constitué de composants en quantités égales, l'utilisateur décide quelle norme appliquer. Les variations dans les méthodes d'analyse des mélanges de fertilisants peuvent conduire à des résultats différents, car certaines interactions de composants ou de la matrice peuvent affecter le résultat. Les procédures de validation ont montré que les méthodes normalisées développées sont robustes et fiables pour diverses compositions de produits, mais des interférences éventuelles et des résultats inattendus lors de l'analyse des mélanges de fertilisants sont possibles.

Anorganska gnojila - Določanje specifičnih parametrov

General Information

• Status: Not Published
• Publication Date: 28-Feb-2028
• ICS: 65.080 - Fertilizers
• Technical Committee: CEN/TC 260 - Fertilizers and liming materials
• Drafting Committee: CEN/TC 260/WG 7 - Chemical analysis
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 19-Mar-2026
• Due Date: 13-Oct-2026
• Completion Date: 19-Mar-2026
• Directive: Not Harmonized2019/1009 - Regulation (EU) 2019/1009 of the European Parliament and of the Council of 5 June 2019 laying down rules on the making available on the market of EU fertilising products and amending Regulations (EC) No 1069/2009 and (EC) No 1107/2009 and repealing Regulation (EC) No 2003/2003 (Text with EEA relevance)
• Mandate: M/564 - Fertilising products in support of Regulation (EU) 2019/1009
• Mandate: M/564 AMD 1 - amending Implementing Decision C(2020) 612 as regards certain harmonised standards and standardisation deliverables, deadlines for their adoption and the duration of the validity of the standardisation request
• Mandate: M/564 AMD 2 - Commission Implementing decision amending Implementing Decision C(2020)612 as regards harmonised standards, the deadlines for the adoption of those standards and the duration of the validity of the standardisation request to the European Committee for Standardisation as regards the EU fertilising products in support of Regulation (EU) 2019/1009 of the European Parliament and of the Council
• Ref Project: oSIST prEN 17755:2026 - Inorganic fertilizers - Determination of specific parameters

Relations

• Revises: CEN/TS 17755:2022 - Inorganic fertilizers - Determination of specific parameters
• Effective Date: 03-Jul-2024

Overview

prEN 17755: Inorganic Fertilizers - Determination of Specific Parameters is a draft European Standard developed by CEN/TC 260. This standard specifies reference methods for determining key parameters in inorganic fertilizers, namely granulometry, organic carbon content, and dry matter content. It is applicable to blends where inorganic fertilizers are the primary component by mass or volume and supports compliance with Regulation (EU) 2019/1009 on EU fertilizing products.

Adoption of prEN 17755 facilitates consistent analysis across diverse fertilizer products, supporting quality, regulatory compliance, and reliable product labeling throughout the European market.

Key Topics

Determined Parameters

• Granulometry: Specifies standardized sieving and wet sieving methods to assess particle size distribution and fineness, critical for product performance.
• Organic Carbon Content: Utilizes dry combustion methods to quantify the organic carbon present in inorganic fertilizers and relevant blends.
• Dry Matter Content: Establishes procedures for calculating dry matter by determining water content, ensuring accurate formulation and nutrient content.

Applicability and Limitations

• Applies to products where inorganic fertilizers are the dominant blend component (by mass, volume, or dry mass for liquids).
• If the primary component is not inorganic fertilizer, the standard for that component applies.
• In cases of equal proportion among blend components, the user selects the applicable standard.
• Validated methods are robust across product compositions, but analytical results may vary due to matrix interactions or product complexity.

Applications

The methods outlined in prEN 17755 provide practical value for:

• Manufacturers: Ensuring batch consistency, product quality, and compliance with EU requirements.
• Regulatory Authorities: Supporting market surveillance and control by providing recognized, harmonized testing protocols.
• Laboratories: Offering clear, validated procedures for testing blend products with a predominant inorganic fertilizer proportion.
• Importers and Distributors: Facilitating smooth market entry and legal conformity for fertilizer products sold within the European Union.
• Blending Operations: Guiding assessment and labeling of multi-component fertilizing products, including soil improvers, inhibitors, biostimulants, and liming materials when inorganic fertilizers dominate.

Consistent use of these methods supports product transparency and consumer trust, contributing to safe, effective agricultural inputs.

Related Standards

prEN 17755 employs and references several established CEN and ISO standards. Key related documents include:

• EN 1235:1995: Solid fertilizers - Test sieving for particle size analysis.
• EN 15924:2011: Fertilizers - Determination of fineness of grinding of soft natural phosphates.
• EN 1482-2:2024: Fertilizers, liming materials and inhibitors - Sampling and sample preparation (Part 2).
• prEN 18322:2026: Inorganic fertilizers - Determination of organic carbon content by dry combustion.
• prEN 18292:2026: Inorganic fertilizers - Determination of dry matter content.
• prEN 12944-1 & prEN 12944-2:2026: Vocabulary standards for fertilizers and associated materials.

These standards collectively support robust, harmonized testing and terminology in the fertilizing products sector, ensuring compliance with both industry best practices and legislative requirements such as Regulation (EU) 2019/1009.

Keywords

inorganic fertilizers, granulometry, organic carbon content, dry matter, fertilizer testing, CEN standards, fertilizer blends, prEN 17755, EU Regulation 2019/1009, agricultural inputs, fertilizer quality, regulatory compliance

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2026
Anorganska gnojila - Določanje specifičnih parametrov
Inorganic fertilizers - Determination of specific parameters
Anorganische Düngemittel - Bestimmung spezifischer Parameter
Ta slovenski standard je istoveten z: prEN 17755
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
March 2026
ICS 65.080 Will supersede CEN/TS 17755:2022
English Version
Inorganic fertilizers - Determination of specific parameters
Anorganische Düngemittel - Bestimmung spezifischer
Parameter
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 260.
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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17755:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Sampling and sample preparation . 6
4.1 Sampling . 6
4.2 Sample preparation . 6
5 Determination of specific parameters . 6
5.1 Granulometry . 6
5.2 Organic carbon content . 6
5.3 Dry matter content . 6
Bibliography . 8

European foreword
This document (prEN 17755:2026) has been prepared by Technical Committee CEN/TC 260 “Fertilizers
and liming materials”, the secretariat of which is held by DIN.
This document is currently submitted to CEN Enquiry.
This document will supersede CEN/TS 17755:2022.
CEN/TS 17755:2022:
a) The CEN Technical Specification has been adopted as a European Standard including the addition of
Annex ZA;
b) Scope (Clause 1) updated;
c) Normative references (Clause 2) updated;
d) Determination of organic carbon content (5.2) and the dry matter content (5.3) added;
e) Bibliography updated.
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
Regulation (EU) 2019/1009 [1] lays down the rules on the making available on the market of EU
fertilizing products and the specific safety and quality requirements for the defined product function
categories (PFCs). Inorganic fertilizers have been classified into PFC 1(C).
The specific safety and quality requirements in relation to the specific parameters are defined in this
document as well as normative references of the test methods to be used in order to measure the
compliance with the related requirement in the Regulation (EU) 2019/1009 [1].
...