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Dispersion of surface-applied salts in porous media

Published online by Cambridge University Press:  27 March 2009

R. N. Pandey
R. N. Pandey
Affiliation:
Central Soil Salinity Research Institute, Karnal (Haryana), India
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Summary

Equations to predict the leached fractions of initially surface-applied salts either with irrigation water or broadcast on the soil surface have been derived from the solution of the dispersion-convection equation. Predictions obtained from these equations compare well with observed leaching data of chlorides and nitrates. It is shown that the loss of fertilizers when applied with irrigation water is reduced compared with that of applying it by broadcasting. The use of equations for predicting soil salinization and leaching of surface-concentrated salts is also indicated.

Information

Type
Research Article
Information
The Journal of Agricultural Science , Volume 92 , Issue 3 , June 1979 , pp. 663 - 668
Copyright
Copyright © Cambridge University Press 1979

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References

REFERENCES

Aylmobe, L. A. G. & Karim, , (1968). Leaching of fertilizer ions in soil columns. Transactions of 9th International Congress of Soil Science 1, 143–153.Google Scholar
Bresler, E. (1973). Simultaneous transport of solute and water under transient unsaturated flow conditions. Water Resources Research 9, 975–966.CrossRefGoogle Scholar
Burns, I. G. (1975). An equation to predict the leaching of surface applied nitrate. Journal of Agricultural Science, Cambridge 85, 443–454.CrossRefGoogle Scholar
Cagauan, B. G., Lau, L. S., Green, R. E. & Uchara, xs, & Uchara, H. (1968). Solute dispersion in two Hawaiian soils under saturated flow. Transactions of 9th International Congress of Soil Science 1, 185–194.Google Scholar
Carslaw, H. S. & Jaeger, J. C. (1969). Conduction of Heat in Solids. London: Oxford University Press.Google Scholar
Cho, C. M. (1971). Convective transport of ammonium with nitrification in soils. Canadian Journal of Soil Science 511, 339–350.CrossRefGoogle Scholar
Jensen, H. E. (1976). Nitrogen movement and leaching in soils, Lysimeter experiment. Nordic Hydrology 7, 19–30.CrossRefGoogle Scholar
Mishra, C., Nielsen, D. R. & Biggar, J. W. (1974). Nitrogen transformation in soil during leaching. Theoretical considerations. Proceedings of the Soil Science Society of America 38, 289–293.CrossRefGoogle Scholar
Nielsen, D. R. & Biggar, J. W. (1962). Miscible displacement. III. Theoretical considerations. Proceedings of the Soil Science Society of America 26, 216–221.CrossRefGoogle Scholar
Ogata, A. & Banks, R. B. (1961). A solution of the differential equation of longitudinal dispersion in porous media. Professional Paper, No. 411-A, U.S. Geological Survey, Washington, D.C.Google Scholar
Pandey, R. N. (1978). A prediction equation for leaohing of uniformly incorporated salts to a known depth. Current Agriculture 2, 7–12.Google Scholar
Pandey, R. N. & Gotta, S. K. (1978). Equations to predict leaching of soluble salts in saline soils. Journal of Agricultural Science, Cambridge 91, 131–134.CrossRefGoogle Scholar
Patrick, W. H. Jr & Reddy, K. R. (1976). Fate of fertilizer nitrogen in a flooded rice soil. Proceedings of the Soil Science Society of America 40, 678–180.CrossRefGoogle Scholar
Warrick, A. W., Kichen, J. H. & Thames, J. L. (1972). Solution for miscible displacement of soil water with time dependent velocity and dispersion coefficient. Proceedings of the Soil Science Society of America 36, 863–867.CrossRefGoogle Scholar