This European Standard specifies two methods for the determination of the neutralizing value (NV) of liming materials. Method A is applicable to all liming materials except silicate liming materials. Method B is applicable to all liming materials. Both methods do not correctly take into account the potential neutralizing value of material containing more than 3 % P2O5. For a more accurate agronomic assessment of products containing more than 3 % P2O5 determine the liming efficiency according to EN 14984. NOTE The methods described in ISO 6598 [1] and ISO 7497 [2] can be used for the determination of P2O5 content. Further information on P analyses is given in [3] and [4].
EN 12945:2014 Referenced Document
EN 12944-3:2001 Fertilizers and liming materials - Vocabulary - Part 3: Terms relating to liming materials*， 2024-04-20 Update
EN 1482-1:2007 Fertilizers and liming materials - Sampling and sample preparation - Part 1: Sampling
EN 1482-2:2007 Fertilizers and liming materials - Sampling and sample preparation - Part 2: Sample preparation
EN 14984:2006 Liming materials - Determination of product effect on soil pH - Soil incubation method
EN ISO 3696:1995 Water for Analytical Laboratory Use- Specification and Test Methods (ISO 3696 : 1987)
ISO 3310-1:2000 Test sieves - Technical requirements and testing - Part 1: Test sieves of metal wire cloth
ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results - Part 1: General principles and definitions
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results - Part 3: Intermediate measures of the precision of a standard measurement method
EN 12945:2014 history
2016EN 12945:2014+A1:2016 Liming materials - Determination of neutralizing value - Titrimetric methods
2014EN 12945:2014 Liming materials - Determination of neutralizing value - Titrimetric methods
2008EN 12945:2008 Liming materials - Determination of neutralizing value - Titrimetric methods Incorporating corrigendum May 2009
2002EN 12945:2002 Liming Materials - Determination of Neutralizing Value - Titrimetric Methods Ratified European Text