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- Sharpley, A.N.
- Soil Science Society of America journal 1996 v.60 no.5 pp. 1459
- iron oxides, etc ; animal manures; Ultisols; Alfisols; pig manure; poultry manure; cattle; land application; soil fertility; phosphorus; nutrient availability; residual effects; extraction; losses from soil; runoff; eutrophication; environmental protection; optimization; water quality; pollution control; fertilizer requirements; Show all 21 Subjects
- ... In many areas with confined animal operations, continual manure application has increased soil P above amounts sufficient for optimum crop yields. In these areas, it is of economic and environmental importance to determine how long high-P soils will remain above crop sufficiency and identify soils where P contents would decrease most rapidly under similar management conditions. Thus, the surface 5 ...