EJSSEurasian Journal of Soil ScienceEurasian J Soil Sci2147 - 4249Federation of Eurasian Soil Science Societieshttp://ejss.fesss.org/10.18393/ejss.47756010.18393/ejss.477560Study on pH in water and potassium chloride for Bulgarian soilsAlexander N. Sadovski bsc.ieas@yahoo.com8111 - 162018-01-262018-09-262018-11-092019-01-09 Copyright © 2016 The authors and Federation of Eurasian Soil Science Societies Soil pH is commonly measured in water pH(H2O) or pH(KCl). The relationship between pH(H2O) and pH(KCl) across all Bulgarian soils were investigated and results examining the effect of soil type on the relationship were presented. Several functions were used to estimate dependence between the two measures. For all soils and depths, a linear regression accounted for 95.32% of the variation, which predicts pH(KCl) very well. From the analysis of data follows that they were differentiated into three clusters.Soil pH, soil database, cluster analysis