Infiltration and Percolation Characteristics of Water in Agricultural Land Filled with Rock-Dust

암분 매립 농경지 토양의 표면 침투 및 삼투 특성

  • Hur, S.O. (National Academy of Agricultural Science (NAAS)) ;
  • Jeon, S.H. (National Academy of Agricultural Science (NAAS)) ;
  • Lee, Y.J. (National Academy of Agricultural Science (NAAS)) ;
  • Han, K.H. (National Academy of Agricultural Science (NAAS)) ;
  • Jo, H.R. (National Academy of Agricultural Science (NAAS)) ;
  • Kang, S.S. (National Academy of Agricultural Science (NAAS)) ;
  • Kim, M.S. (National Academy of Agricultural Science (NAAS)) ;
  • Ha, S.G. (National Academy of Agricultural Science (NAAS)) ;
  • Kim, J.G. (Division of Environmental Science and Ecological Engineering, Korea University)
  • Received : 2009.06.12
  • Accepted : 2009.08.06
  • Published : 2009.12.28

Abstract

This study was carried for the understanding of infiltration and percolation characteristics of water in agricultural land filled with rock-dust (Technosols). The experiment was performed at two sites (A, B), and soil horizons of the sites were classified with 4 layers, respectively. The soil texture of all soil horizons was analyzed with silt loam (SiL) except for the soil texture, which was loamy sand (LS), at the lowest horizon of measurement site A. The bulk densities at each horizon of two soils were mostly over $1.49g{\cdot}cm^{-3}$, which is very higher than $1.25g{\cdot}cm^{-3}$ of typical medium-textured mineral soil, except for the surface of site A measured immediately after tillage. The concentrations of $P_2O_5$ at surface of two soils s were 1962 (A), 1613 (B) $mg{\cdot}kg^{-1}$, respectively. These concentrations are 3.2~6.5 times of $300{\sim}500mg{\cdot}kg^{-1}$, which is the optimum concentration for crop growth. Infiltration rates at surface of the soils were 3.54 (A), 2.85 (B) cm $hr^{-1}$, but percolation rates at soil horizons under the surface were below 0.3 (A), below 0.003 (B) cm $hr^{-1}$. These results would be because the surface soils were managed by tillage and crop planting etc., but soils under surface were formed with structural problems occurred at the formation time of agricultural land accumulated with rock-dust or a compaction by farm machines.

Keywords

Infiltration;Percolation;Rock-Dust;Technosols;Soil Management