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AbstractIn order to estimate the role of phosphatases in maintaining the potential bioavailable P pool in soils, water and 0.4M NaOH soil extracts were incubated with immobilized acid phosphatase, alkaline phosphatase, phospholipase and nuclease, separately, and in combinations. Immobilized nuclease at an optimum pH of 7.0 hydrolyzed the most soluble unreactive P (SUP) both in water and 0.4M NaOH...