Table 1.

Soil particle-size data used in this study.

Soil fractions schemes	The particle-size limits (mm)	Number
T1 (ISSS†)	2, 0.2, 0.02, 0.002	15262
T2 (Katschinski‡)	1, 0.25, 0.05, 0.01, 0.005, 0.001	671
T3§ (Katschinski)	1, 0.05, 0.01, 0.005, 0.001	1090

^†ISSS: international system of International Soil Science Society.

^‡Katschinski: Katschinski classification system of Russia.

^§T3 contains the data of T2 after summing up the 1–0.25 mm and 0.25–0.05 mm fraction.