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BSI PD CEN/TS 17714:2022

$102.76

Plant biostimulants – Determination of microorganisms’ concentration

Published By Publication Date Number of Pages
BSI 2022 22
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This document specifies general rules to determine the concentration of microorganisms present in plant biostimulant products. The method is applicable to microbial plant biostimulants for verifying that the concentration of microorganisms does not exceed the respective limits outlined in the EU Regulation on Fertilising Products [1]. This horizontal method might not be appropriate in every detail for certain products. In this case, it is necessary to refer to the methodology of specific determination and quantification of the microorganisms.

PDF Catalog

PDF Pages PDF Title
2 National foreword
5 European foreword
6 Introduction
8 1 Scope
2 Normative references
3 Terms and definitions
9 4 Principe of the method
5 Sampling
6 Preparation of sample for microbial analysis
7 Method for enumeration of microorganisms
7.1 General
7.2 Enumeration using a solid media
7.2.1 General
10 7.2.2 Number of Petri dishes per dilution
7.2.3 Pour plate techniques
7.2.4 Surface inoculation
11 7.2.5 Incubation
7.2.6 Calculation and expression of results obtained with solid media
18 7.3 Enumeration and quantification using a liquid medium
7.3.1 Principle
7.3.2 Inoculation
7.3.3 Choice of inoculation system
20 8 Expression of results
9 Test report
10 Quality assurance
21 Bibliography
BSI PD CEN/TS 17714:2022
$102.76