||Spodosol Cation Release and Buffering of Acidic Inputs.
Vance, G. F. ;
David, M. B. ;
||Wyoming Univ., Laramie. Dept. of Plant, Soil, and Insect Sciences. ;Illinois Univ., Urbana. Dept. of Forestry.;Corvallis Environmental Research Lab., OR.
Soil chemistry ;
Land pollution ;
Forest soils ;
Acid neutralizing capacity ;
Cation exchanging ;
Proton transport ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||The release and leaching of base cations and aluminum by acid additions to O and B soil horizons was examined using both batch and column experimental methods. Solution and soil contact time was a significant factor in the amount of cation release and leaching from the B horizon. Increased acidity resulted in greater levels of base cations and aluminum being released or leached from all soils. The type of acid anion, NO3(-) or SO4(-2), strongly influenced the amount of soil base cation released; Ca(2+) was much lower in the H2SO4 extracted solutions. Gypsum formation was suggested as a possible explanation for the decreased Ca(2+) levels; however, SO4(-2) adsorption was also believed to contribute to the reduction in base cation release. Proton buffering was due to three soil processes which included: cation exchange reactions, protonation of organic constituents, and SO4(-2) adsorption. Differences in contact time and solution composition were deemed to be important factors in cation release from the soils. (Copyright (c) 1991 by Williams & Wilkins.)
||Pub. in Soil Science, v151 n5 p362-368 May 91. See also PB91-116798. Prepared in cooperation with Illinois Univ., Urbana. Dept. of Forestry. Sponsored by Corvallis Environmental Research Lab., OR.
|NTIS Title Notes
||Reprint: Spodosol Cation Release and Buffering of Acidic Inputs.
||48E; 68; 99F
||PC A02/MF A01