Influence of Robinia pseudoacacia L. and Quercus robur L. artificial forest plantations on the particle-size distribution of calcic chernozem

The particle-size distribution is one of the most important characteristics soils, which determines their properties and features main regimes. Artificial forest plantations in steppe act as a powerful environment-transforming factor, over time capable changing even quite conservative including distribution. study influence on was carried out using soil samples taken from calcic chernozem, chernozem under plantation R. pseudoacacia L. Q. robur determination by pipette method, with preparation sample trituration solution sodium pyrophosphate. classification granulometric fractions given according to N. A. Kaczynskii. analysis ratio studied chernozems revealed that zonal characterized an increased content sand fraction reduced silt H1 H2 horizons compared lower horizons. relatively uniform sand, dust along profile. In L., maximum found surface horizon, gradual decrease this depth, while depth. growth leads increase physical clay fractions. There also certain change profile fractions, especially plantations. Each investigated specific «sand : silt» indicates different genesis