Soil Carbonates

The exposure of calcium carbonate soils by erosion in early stages of desertification may contribute to the paucity of available nitrogen by ammonium volatilization. In soils of high pH, ammonium is converted to NH3 which is lost to the atmosphere by ... 

Table IV uses DBCP to illustrate the effect of soil organic carbon concentration on leaching mobility. In the very low organic carbon soil, there is almost no adsorption for the compound and the leaching model breaks down because it predicts penetration depths greater than the water penetration. In these cases the prediction is adjusted to show compound and water penetration depths as the same.

UNFCCC (1997) Kyoto protocol to the United Nations Framework Convention on climate change. Document FCCC/CP/1997/7/ Add 1, http //www.unfccc.de Van Cleve K, Powers RF (1995) Soil carbon, soil formation, and ecosystem development. In McFee WW, Kelly JM (eds) Carbon forms and functions in forest soils. Soil Science Society of America, Madison, WI, pp 155-200 Wedin TA, Tieszen LL, Dewey B, Pastor J (1995) Carbon isotope dynamics during grass decomposition and soil organic matter formation. Ecology 76 1383-1392... 

The amount of carbon stored or sequestered in the soil is also influenced by the soil carbon content (Fig. 8.6). Sensitivity analysis showed that (1) the carbon sequestration potential is higher in low than high carbon soils and (2) the net carbon... 

Southworth, G.R. and Keller, J.L. Hydrophobic sorption of polar organics by low organic carbon soils. Water, Air, Soil Pollut., 28(3-4) 239-248, 1986. 

Suba, J.D. and Essington, M.E. Adsorption of fluometuron and norflurazon effect of tillage and dissolved organic carbon. Soil Sci, 164(3) 145-155, 1999. 

Stott, D. E., Martin, J. P., Focht, D. D. Haider, K. (1983). Biodegradation, stabilization in humus, and incorporation into soil biomass of 2,4-D and chlorocatechol carbons. Soil Science Society of American Journal, 47, 66-70. 

Spain carbonate soils associated with Aznalcollar mine tailings spill 15.1-1480.5 (0-101 cm depth) Simon et al. (2002)... 

Grafe, M Eick, M.J. and Grossl, P.R. (2001) Adsorption of arsenate (V) and arsenite (III) on goethite in the presence and absence of dissolved organic carbon. Soil Science Society of America Journal, 65(6), 1680-87. 

Simdn, M., Dorronsoro, C., Ortiz, I. et al. (2002) Pollution of carbonate soils in a Mediterranean climate due to a tailings spill. European Journal of Soil Science, 53(2), 321-30. 

Kaiser, K., L. Haumaier, and W. Zech. 2000. The sorption of organic matter in soils as affected by the nature of soil carbon. Soil Science 165 305—313. 

Stanford, G., Vanderpol, R. A., and Dzienia, S. (1975). Denitrification rates in relation to total and extractable soil carbon. Soil Sci. Soc. Am. Proc. 39, 284-289. 

Girvin, D.C., Sklarew, D.S., Scott, A.J., Zipperer, J.P (1997) Polychlorinated biphenyl desorption from low organic carbon soils measurement of rates in soil-water suspension. Chemosphere 35, 1987-2005. 

Similar terms can be derived for other flux components based on knowledge of the isotopic composition of the source material (e.g., atmospheric CO2, ocean-surface inorganic carbon, soil organic carbon) and knowledge of the associated, process-based, isotopic fractionation (e.g., sp for photosynthesis, cr for respiration). Note also that terms such as 5a -b Sao in Equation (14) are also approximations of A. ... 

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