Research Information System
BODENKULTUR, vol.53, no.4, pp.183-189, 2002 (SCI-Expanded)
Solute transport during ponding infiltration was investigated in large soil columns. In order to create slow and fast water flow velocities, 3 cm and 6 cm of water were ponded constantly during the leaching on the surface of a sandy clay loam (SCL) and a clay loam (CL) soil column. Although the amount of water used in the 3 cm water applications for both soils was lower than in the case of the 6 cm water applications, more time was necessary to lower the electrical conductivity (EC) of soils to a specific level in the 3 cm applications. The EC of effluent initially increased from 11.9 dS m(-1) to 39.6 dS m(-1) and later began first to reduce to 6.2 dS m(-1) by 16 cm of water, and then to 2 dS m(-1) by 11.2 cm of water for the CL soil. Slow changes in the concentrations of Ca+2, and Mg+2 through the end of the leaching were assessed especially in the CL soil. K+1 and Cl-1 leached easily in both water application rates, and Na+ movement was moderate but steady until the end of leaching events. Boron concentration was not reduced to the specific desired level in all experiments by three leaching events. However, in a fourth leaching event the boron concentration was lowered from 4.8-4.5 to 1.1-1.0 mg kg(-1). Experimental results showed that the different water flow velocities had no effect on the boron transport.