| Main Title |
Forest Soil Organic Horizon Acidification: Effects of Temperature, Time, and Solution/Soil Ratio. |
| Author |
James, B. R. ;
Riha, S. J. ;
|
| CORP Author |
Cornell Univ., Ithaca, NY.;Corvallis Environmental Research Lab., OR. |
| Publisher |
c1988 |
| Year Published |
1988 |
| Report Number |
EPA/600/J-87/484; |
| Stock Number |
PB90-103094 |
| Additional Subjects |
Forests ;
Soil chemistry ;
Acidification ;
Soil water ;
PH ;
Calcium ;
Aluminum ;
Carbon ;
Temperature ;
Solutions ;
Dissolved organic matter ;
Reprints ;
Time factors
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB90-103094 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
8p |
| Abstract |
A forest soil organic horizon (Oe) was acidified with HNO3 (0-5 cmol/kg) in the laboratory at three solution/soil ratios (10, 50, 100), three temperatures (4, 14, 30 C), and for up to 162 h to compare effects to added H+ on pH, soluble Ca, Al, and C with effects of environmental conditions likely to vary seasonally in the forest floor. Soil suspension pH reached a steady state within 48 h, regardless of quantity of H+ added, solution/soil ration, or temperature. Calcium concentrations also reached a steady state with soil solid phases quickly, and additions of H+ increased quantities of Ca (mmol/kg) in solution as did increasing solution/soil ratio. Shaking time and temperature had smaller effects on Ca than did H+ additions and solution/soil ratio. In contrast, reactions controlling dissolved organic carbon (DOC) and total soluble aluminum (Alt) were slower than those for pH and Ca. Quantities of DOC and Al going into solution remained nearly constant, so that increasing the solution soil ratio diluted concentrations. Dissolved organic C and soluble Al increased with longer shaking times and higher temperature. The results have implications for designing realistic laboratory experiments on forest floor acidification, for evaluating seasonal and yearly variations in soil solution composition in the field, and in developing accurate and reliable simulation models of H+ reactions in forest soils. |
| Supplementary Notes |
Pub. in Soil Science Society of American Jnl. v51 n2 p458-462 Mar/Apr 87. Sponsored by Corvallis Environmental Research Lab., OR. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Forest Soil Organic Horizon Acidification: Effects of Temperature, Time, and Solution/Soil Ratio. |
| Category Codes |
48E; 48D |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/02 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
935215927 |
| Origin |
NTIS |
| Type |
CAT |
