FprEN 17700-5

SLOVENSKI STANDARD
oSIST prEN 17700-5:2023
01-maj-2023
Rastlinski biostimulanti - Navedbe - 5. del: Določanje razpoložljivosti hranil v tleh
in rizosferi
Plant biostimulants - Claims - Part 5: Determination of availability of confined nutrients in
the soil or rhizosphere
Pflanzen-Biostimulanzien - Auslobungen - Teil 5: Bestimmung der Verfügbarkeit von
gebundenen Nährstoffen im Boden oder in der Rhizosphäre
Biostimulants des végétaux - Allégations - Partie 5 : Détermination de la disponibilité des
éléments nutritifs confinés dans le sol ou la rhizosphère
Ta slovenski standard je istoveten z: prEN 17700-5
ICS:
65.080 Gnojila Fertilizers
oSIST prEN 17700-5:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 17700-5:2023
oSIST prEN 17700-5:2023
DRAFT
EUROPEAN STANDARD
prEN 17700-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2023
ICS 65.080 Will supersede CEN/TS 17700-5:2022
English Version
Plant biostimulants - Claims - Part 5: Determination of
availability of confined nutrients in the soil or rhizosphere
Biostimulants des végétaux - Allégations - Partie 5 : Pflanzen-Biostimulanzien - Auslobungen - Teil 5:
Détermination de la disponibilité des éléments nutritifs Bestimmung der Verfügbarkeit von gebundenen
confinés dans le sol ou la rhizosphère Nährstoffen im Boden oder in der Rhizosphäre
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 455.
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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17700-5:2023 E
worldwide for CEN national Members.

oSIST prEN 17700-5:2023
prEN 17700-5:2023 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Terminology of the claims . 6
4.1 Claims . 6
5 Assessment markers to validate the claim . 6
5.1 General considerations for markers measurements . 6
5.2 Soil or rhizosphere markers . 7
5.2.1 Soil sample preparation . 7
5.2.2 Available soil nutrient determination . 7
5.3 Plant markers . 7
5.3.1 Plant sample preparation . 7
5.3.2 Plant nutrient determination . 7
6 Specifications for the performance of the trials . 8
6.1 General specifications . 8
6.2 Trial design . 8
6.2.1 General . 8
6.2.2 Timetable of measurements . 9
Annex A (informative) Examples of methods to measure the nutrient availability in soil or
rhizosphere .10
Annex B (informative) Digestion and analysis of plant samples .11
B.1 Example of procedure for the digestion of plant samples .11
B.2 Example of methods for plant nutrient analysis .11
Annex C (normative) Triangle of soil texture .12
Annex ZA (informative) Relationship of this European Standard and the essential
requirements of Regulation (EU) 2019/1009 making available on the market of EU
fertilizing products aimed to be covered .13
Bibliography .14
oSIST prEN 17700-5:2023
prEN 17700-5:2023 (E)
European foreword
This document (prEN 17700-5:2023) has been prepared by Technical Committee CEN/TC 455 “Plant
biostimulants”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede CEN/TS 17700-5:2022.
prEN 17700-5:2023 includes the following significant technical changes with respect to
CEN/TS 17700-5:2022:
— Update of Annex A and C.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part
of this document.
The EN 17700 series, Plant biostimulants — Claims, consists of the following parts:
— Part 1:General principles;
— Part 2: Nutrient use efficiency resulting from the use of a plant biostimulant;
— Part 3: Tolerance to abiotic stress resulting from the use of a plant biostimulant;
— Part 4: Determination of quality traits, resulting from the use of a plant biostimulant;
— Part 5: Determination of availability of confined nutrients in the soil or rhizosphere.
oSIST prEN 17700-5:2023
prEN 17700-5:2023 (E)
Introduction
This document has been developed to provide guidance for a consistent approach to justify the claims
associated with the use of plant biostimulants in agriculture.
The definition of plant biostimulants to be used in the regulation on fertilizing materials is claims-based.
For this reason, demonstrating that a product is indeed a bona fide plant biostimulant depends on a
demonstration of its effect.
The placing of a plant biostimulant on the market should never be considered to guarantee effectiveness
under all conditions, as many factors may influence the performance of a plant biostimulant in the field.
Plant biostimulants used in agriculture can be applied in multiple ways: on soil, on plant, as seed
treatment, etc. This document is applicable to all application types of plant biostimulants in agriculture.
WARNING — Persons using this document should be familiar with normal laboratory practice. This
document does not purport to address all of the safety problems, if any, associated with its use. It is the
responsibility of the user to establish appropriate safety and health practices and to ensure compliance
with any national regulatory conditions.
IMPORTANT — It is absolutely essential that tests conducted in accordance with this document be
carried out by suitably trained staff.

oSIST prEN 17700-5:2023
prEN 17700-5:2023 (E)
1 Scope
The claim described in this document concerns the improvement of availability of confined nutrients in
the soil or rhizosphere by a plant biostimulant.
This document is aimed primarily at manufacturers, laboratories, researchers, technical centres,
companies that will put the products on the market, notifying authorities, notified bodies, and market
surveillance authorities.
To be in compliance with this standard, it is important also to follow the Recommendations and Quality
Criteria described in the Standard of General Principles EN 17700-1:— .
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 17700-1:— , Plant biostimulants — Claims — Part 1: General principles
EN 17724:— , Plant biostimulants — Terminology
3 Terms and definitions
1 2
For the purposes of this document, the terms and definitions given in EN 17700-1:— , EN 17724:— , and
the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
available nutrient
element either present in the soil solution or exchangeable on soil colloids
3.2
confined nutrient
element present in the solid and gaseous phase of the soil, except on soil colloids
3.3
improvement of availability of confined nutrients in the soil or rhizosphere
moving soil nutrients from the pool of confined nutrients to the pool of available nutrients
3.4
rhizosphere
volume of soil around living roots that is influenced by root activities

Under preparation
Under preparation
oSIST prEN 17700-5:2023
prEN 17700-5:2023 (E)
3.5
soil
layer of unconsolidated material consisting of weathered material particles, dead and living organic
matter, air space, and soil solution
3.6
soil solution
liquid phase of the soil and its solutes
3.7
soil colloid
finer size fraction of the soil (clay and organic matter), being also considered as the most chemically active
portion of the soil because of its large surface area and the chemical structure of the materials involved
4 Terminology of the claims
4.1 Claims
Claimed improvement of availability of confined nutrients shall be completed with one or more
nutrient(s) which is/are concerned by this effect (e.g. nitrogen (N), phosphorus (P), nitrogen and
phosphorus (N and P), potassium (K), zinc (Zn), microelements, …).
Moreover, it is possible to specify in the claim if it is applied to soil or rhizosphere or both.
Soil types and pH categories shall be indicated according to the validated claims (see 6.2.1).
Some examples of claims which can be mentioned on the label are presented hereunder:
— “Improves availability of microelements confined in the soil and the rhizosphere”,
— “Improves availability of phosphorus in the rhizosphere”,
— “Improves availability of nitrogen in the soil”.
5 Assessment markers to validate the claim
5.1 General considerations for markers measurements
Improvement of the availability of nutrients confined in the soil shall be evaluated by comparing the
concentration or quantity of the available nutrient element (in the soil, soil and rhizosphere or plants) in
the control treatment (without plant biostimulant application) and in the plant biostimulant treatment
(applied plant biostimulant).
Markers shall be determined with the same methods and same equipment on both control treatment and
plant biostimulant treatment.
Markers to evaluate the improvement of the availability of nutrient confined in the soil or rhizosphere,
noted as markers in the text, could be determined on 3 different matrixes (soil, soil and rhizosphere or
plants). For each matrix, markers shall be determined on representative samples.
NOTE Growing medium is not considered as soil or soil rhizosphere in this document.

oSIST prEN 17700-5:2023
prEN 17700-5:2023 (E)
5.2 Soil or rhizosphere markers
...