The transformations of phosphate in gypsiferous soils of Iraq
1993
Al-Khateeb, I.K. | Al-Azzawi, S.N. | Al-Bedri, F.R. (AL-Anber Univ. (Iraq). Coll. of Science)
This study was conducted to determine the phosphate precipitation dissolution kinetics and solubility of calcium phosphates in gypsiferous soils of Iraq. The results showed a sharp decrease in the concentration of water soluble P within 24h after P addition. There was a gradual decrease in soluble calcium and sulfate concentration with increasing levels of P addition especially at early intervals of incubation. Soluble Ca2+ in soil solution was more important in controlling phosphate solubilities in gypsiferous soil when potassium or the phosphate was added
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