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- [28] THE RELEASE OF EXCHANGEABLE AND NONEXCHANGEABLE POTASSIUM FROM DIFFERENT SOILS UPON CROPPING JOURNAL OF THE AMERICAN SOCIETY OF AGRONOMY, 1945, 37 (09): : 709 - 721
- [29] EFFECT OF DRYING AND REWETTING ON EXCHANGEABLE POTASSIUM CONTENT OF SUDAN GEZIRA SOILS AGROCHIMICA, 1971, 15 (4-5): : 356 - &