Soil pH is an important parameter that helps to interpret the availability of nutrients and the various biological functions in soils. Measurement of soil pH is usually carried out with electrical conductivity (EC) measurement, which is generally considered as a salinity indicator. International Standardization Organization (ISO) states that soil pH and EC should be measured in 1:5 soil/water mixtures. However, soil pH and EC in most of published research reports or scientific papers have been determined in various soil/water ratios such as 1: 1, 1: 2, 1: 2.5, 1:5 along with saturation paste. In this study, five different soil pH and EC values were measured including 3 different (1: 1, 1: 2 and 1: 5) soil/water mixtures, saturation paste and effluent extracted from saturation paste and the pH and EC values were compared. Soils evaluated in this study were collected from a large land located in Central Anatolia. Forty-eight saturation pastes and effluents and 137 soil/water extracts have been evaluated for this study. Mean pH and EC values for saturation paste were determined as 8.50 and 7.13 dS m-1, respectively, while mean pH and EC values of 1:5 soil/water mixtures were 9.01 and 2.75 dS m-1, respectively. The difference between pH and EC values of different soil/water mixtures was assessed by a paired t-test. All measurements except for the pH values measured in the saturation paste and 1: 1 soil/water mixture were different from each other. The pH and EC values of soil/water extracts decreased with the increase in water content. The increase in water content decreased the concentration of soluble salts and hydrogen ions in the solution. The results revealed that 1:1 soil/water mixture could be used reliably in place of saturation paste for pH measurement. Specifying the ratio of soil/water mixture used to determine the pH and EC values in research reports and papers will also help readers better interpret the data
