The Potassium Status of Hartsells Fine Sandy Loam as Affected by Potassium Fertilization
1958
Rouse, R. D.
The K status of Hartsells fine sandy loam was characterized in the field by cropping for 18 years at rates of K ranging from 0 to 80 pounds per acre followed by 9 years of cropping without further additions. The K supplying power, exchangeable K, K content of cotton leaves, and cotton yield were determined annually during the residual period. These data indicate that the easily replaceable nonexchangeable K and the exchangeable K are both of value in sustained crop production. The rate of K application found to be adequate during the rate's study was inadequate when applied to former check plots until the application had been repeated annually for 5 or 6 years. It was found feasible to bring plots to a desired level of exchangeable K by discreet additions.
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