Nitrate sorption in the profile of an acid soil (original) (raw)
Abstract
Sorption of NO sup−inf3 by different horizons of a highly weathered, acid tropical soil was measured in laboratory batch experiments. Sorption was found to increase with depth, ranging from small amounts in the 0–15 cm layer to amounts that would be roughly equivalent to 25 to 50% of the NO sup−inf3 in the 90–120 cm layer at water and NO sup−inf3 contents commonly found under field conditions. Calculations, based on sorption isotherms, demonstrated how sorption may be important for managing N in a tropical acid soil. Sorption of Cl− was also found in the range of 0.1 and 2.0 mol m−3. In this range of concentrations sorption of NO sup−inf3 and chloride were found to be independent, suggesting that anion exchange sites were far from saturated.
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Authors and Affiliations
- Department of Soil, Crop and Atmospheric Sciences, Cornell University, 14853, Ithaca, NY, USA
M. D. Cahn & D. R. Bouldin - EMBRAPA Centro de Pesquisa Agroflorestal da Amazonia, C.P. 455, 69.000, Manaus, AM, Brazil
M. S. Cravo
Authors
- M. D. Cahn
- D. R. Bouldin
- M. S. Cravo
Additional information
Contribution from the Department of Soil, Crop and Atmospheric Sciences, New York State College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853. SCAS paper No. 1726. This research is part of the TropSoils program.
Contribution from the Department of Soil, Crop and Atmospheric Sciences, New York State College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853. SCAS paper No. 1726. This research is part of the TropSoils program.
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Cahn, M.D., Bouldin, D.R. & Cravo, M.S. Nitrate sorption in the profile of an acid soil.Plant Soil 143, 179–183 (1992). https://doi.org/10.1007/BF00007871
- Received: 23 July 1991
- Issue date: June 1992
- DOI: https://doi.org/10.1007/BF00007871