Home › Authors › P. F. Pratt 👤 P. F. Pratt 3 books Books by P. F. Pratt Nitrate in the unsaturated zon Nitrate in the unsaturated zone under agricultural lands 1972 Soluble phosphorous in soil of Soluble phosphorous in soil of Ohio 1955 Potassium release from exchang Potassium release from exchangeable and nonexchangeable forms in Ohio soils 1954