THE EFFECTS OF MOISTURE AND TIME UPON THE TRANSFORMATIONOF FIXED PHOSPHATES IN SAN SAI SOIL SERIES
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Oct 29, 2020
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Abstract
San sai soil series which textural class ranges from sandy loam to sandy clay loam, was formaly both limed and fertilized. Clay phosphates and ferric-aluminium phosphates were proved to be the principal sources of phosphates supplied to plant. Calcium phosphates were not a source of phosphates to plant. The result of this experiment also implied that the formation constant of ferric-aluminium phosphates might be greater than that of clay phosphates. The moisture levels have no significant effect on the transformation among phosphate forms but the time does.
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References
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Hsu, P.H. (1965). Fixation of Phosphate by Aluminium and Iron in Acidic Soils. Soil Science. 99: 398- 402.
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Kittrick, J.A. and Jackson, M.L. (1955). Rate of Phosphate Reaction with Soil Minerals and Electron Microscope Observations on the Reaction Mechanism. SSSAP. 19, 292-295.
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Swenson, R.M., Cole, C.V. and Sieling, D.H. (1949). Fixation of Phosphate by Iron and Aluminum and Replacement by Organic and Inorganic Ions, Soil Science 67: 3-22.
Bolt, G.H. and Bruggen wert, M.G.M. (1978). Soil Chemistry. A Basic Elements. 2nd Ed. Elesevier Scientific Publishing Com. Amsterdam.
Ghani, M.O. and Islam, M.A. (1946). Phosphate Fixation in Acid Soils and Its Machanism. Soil Science. 62: 293-306.
Hsu, P.H. (1965). Fixation of Phosphate by Aluminium and Iron in Acidic Soils. Soil Science. 99: 398- 402.
Kardos, L.T. (1964). Soil Fixation of Plant Nutrients. Chapter 9 in Chemistry of the Soil. Edited by F.E. Bear. Van Nostrand Reinhold Com. New York.
Kelly, J.B. and Midgley, A.R. (1943). Phosphate Fixation: An Exchange of Phosphate and Hydroxyl lons. Soil Science 55: 167-176.
Kittrick, J.A. and Jackson, M.L. (1955). Rate of Phosphate Reaction with Soil Minerals and Electron Microscope Observations on the Reaction Mechanism. SSSAP. 19, 292-295.
Lindsay, W.L. (1979). Chemical Equilibrium in Soils. A Wiley-Inter science Publication.
Swenson, R.M., Cole, C.V. and Sieling, D.H. (1949). Fixation of Phosphate by Iron and Aluminum and Replacement by Organic and Inorganic Ions, Soil Science 67: 3-22.
