scope:

This document specifies two methods (method A and method B) ofmeasuring the effect of the addition of any material claimed tohave a liming effect on the soil, using the same basic principles.Method A measures the changes to the soil pH resulting from theaddition of any material claimed to have a liming effect on astandard soil, measured over a period of one month. Method Bassesses the efficiency of any material claimed to have a limingeffect, using a range of defined soils and measured over a periodof up to 2,5 years. The methods are not applicable to mineralproducts coarser than 6,3 mm for method A or 20 mm for method B,determined according to EN 12948. NOTE These methods allowcomparison of products under controlled climatic conditions but donot replace field experiments.