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A Simplified Soil and Plant Phosphorus Model: III. Testing
Author(s) -
Jones C. A.,
Sharpley A. N.,
Williams J. R.
Publication year - 1984
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/sssaj1984.03615995004800040022x
Subject(s) - subsoil , topsoil , phosphorus , environmental science , fertilizer , agronomy , soil water , soil fertility , soil science , chemistry , biology , organic chemistry
Testing of a simplified soil phosphorus model is described. Changes in organic P content of the surface soil due to cultivation are simulated relatively accurately for periods of up to 40 years at several locations in the Great Plains. Simulated changes in organic P contents of the subsoil are smaller than those of the topsoil. Concentrations of soil test P are accurately simulated over periods of up to 20 years with and without fertilizer P applications in several soils. Simulated responses of maize ( Zea mays L.) and wheat ( Triticum aestivum L.) to soil test P concentrations are similar to those found in three published studies. Fertilizer P required to maintain adequate P fertility is accurately simulated for maize and wheat at several locations in the U.S.