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SULFUR RETENTION AND CATION LEACHING OF FOREST SOILS IN RESPONSE TO ACID ADDITIONS
Citation:
Fasth, W., M. David, AND G. Vance. SULFUR RETENTION AND CATION LEACHING OF FOREST SOILS IN RESPONSE TO ACID ADDITIONS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-92/083 (NTIS PB92153394), 1991.
Description:
Leachate SO42- concentrations were greater for the high-S than for the low-S treatment for each soil type, resulting in greater cat ion leachate concentrations for soils that received the high-S treatment. alcium was the primary base cation in both the Spodosol and Alfisol leachates. eclining concentrations of base cations and NH4+ over the length of the study led to an increase in Al3+ concentrations and decrease in pH for some of the Spodosol leachates. t is difficult to extrapolate our laboratory rates of change to the BBWM catchments because of differences between the experiment and field conditions. oil temperature, the amount and rate of S application, and the total mass of soil exposed to treatment were hypothesized to be important factors affecting net S retention in Spodosols under field conditions. owever, we feel that SO42-, adsorption under field conditions would still be the primary mechanism of S retention because of similarities between SO42- concentrations in treatment solutions used for the present experiment and those in natural throughfall solutions.
