Phosphate Sorption and Desorption In Tanzanian

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Date
1987
Authors
Singh, B.R.
Gama,B.M.
Uriyo,A.P
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Abstract
Phosphate absorption reactions in highly weathered, tropical soils are important because they affect phosphorus {P) concentration in soil solution (intensity of P nutrition) and its amount retained by a soil (capacity for P nutrition). Such soils often possess a large number of positively charged sites, particularly under acidic conditions and therefore, have opportunities for ligand exchange on their extensive surfaces (Fox et aI. , 1971). Studies in Hawaii (Fox et al .• 1971; Rajan . 1973 and Rajan and Fox. 19n.191S). Fiji (Chee et all., 1978), Papua New Guinea (Parfitt, 1977 and Parfitt and Movo, 197.5). and Sierra Leone (Rhodes, 1975) have shown that phosphate absorption in tropical soils is affected by a number of factor such as P solution concentration and its pH, soil pH, and amounts of organic matter and silica-sesquioxides.
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East African Agricultural And Forestry Journal, 52 (4), p. 213-220