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OLS Field Name OLS Field Data
Main Title Soil Reaction and Acidic Deposition.
Author Reuss, J. O. ; Walthall., P. M. ;
CORP Author Colorado State Univ., Fort Collins. Dept. of Agronomy.;Corvallis Environmental Research Lab., OR.
Publisher 1990
Year Published 1990
Report Number EPA/600/D-90/073;
Stock Number PB90-246422
Additional Subjects Acification ; Soils ; Chemical reactions ; Ion exchanging ; Buffers(Chemistry) ; Deposition ; Agriculture ; Nitrogen ; Fertilizers ; Calcium oxides ; Sulfates ; Adsorption ; Anions ; Concentration(Composition) ; Aluminum hydroxides ; Field tests ; Weathering ; Acid precipitation
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB90-246422 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 08/27/1990
Collation 36p
Abstract
The chapter discusses the major chemical processes by which acidic deposition interacts with soils. The focus is on forest soils, as the effects of acidic deposition on soils used for production of food and fiber are generally small compared to effects of agricultural practices such as nitrogen fertilizer applications and liming. Buffering mechanisms considered include aluminum buffering, silicate mineral buffering, cation exchange, organic buffering, and the effect of anion immobilization processes such as nitrate uptake and sulfate adsorption. The effects of acidic inputs on capacity factors such as exchange acidity, exchangeable base content, and sulfate adsorption capacity are considered, as are related natural processes such as acidification due to accumulation of bases in biomass. Particular attention is paid to intensity effects, such as the effect of increased concentration of anions associated with strong acids on the chemical composition of the soil solution, as they are likely to be highly nonlinear with respect to the capacity factors. These include pH, aluminum mobilization, and loss of alkalinity in the soil solution, which in turn may result in acidification of drainage waters.