SOIL PROPERTIES AFFECTING THE RETENTION OF PHOSPHORUS FROM EFFLUENT

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Abstract
Factors affecting removal of P from waste water effluent on 376 soils from British Columbia and six soils from New Zealand were studied. When shaken at a ratio of 1:50 soil to effluent, the soils of the dry British Columbia interior removed on an average 31% of the effluent P, whereas wet coastal soils removed 85% and the New Zealand soils removed 76%. The capacity of the soil to remove effluent P was related mostly to Al, Fe and P extracted by various extractants, pH, base saturation, organic matter and texture.

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