Comparative studies and assessment of the particle-size distribution in soils of Lithuania by the Kachinskii and FAO methods

The particle-size distribution was analyzed by the Kachinskii and FAO methods in 564 samples collected from 131 soil profiles. Scaling factors are given for converting the data obtained by the Kachinskii method into the FAO method, and the relationship between the particle-size fractions determined by the FAO (y) and Kachinskii (x) methods is presented in the form of a regression equation. It is found that the difference in the data obtained by both methods is controlled not only by the soil texture (sand, sandy loam, loam, etc.) but also by the genesis of the soil-forming deposits, as well as by the amount of humus and carbonates in them.