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Effects of Phosphorus Application Rate, Soil Properties, and Leaching Mode on 32P Movement in Soil Columns
Author(s) -
Logan T. J.,
McLean E. O.
Publication year - 1973
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1973.03615995003700030018x
Subject(s) - leachate , leaching (pedology) , loam , soil water , chemistry , lessivage , environmental science , environmental chemistry , soil science
Movement of 32 P‐labeled monocalcium phosphate was investigated in column experiments with P application rate, P‐fixation capacity, and mode and intensity of leaching as variables. Three soils of contrasting texture and P‐fixation capacity were studied. Leaching of P increased with P application rate and intensity of leaching. Constant head leaching resulted in greater movement of 32 P out of the surface layer and greater accumulation in the leachate than intermittent leaching. In general, 32 P recovered in the leachate was nonionic except in instances where maximum leaching occurred. Significant amounts of 32 P were recovered in the leachate only with sandy loam soil and at the highest P application rate.