Potassium Fertilization of Cotton

W.R. Thompson, Jr.


 
ABSTRACT

Potassium (K) deficiency, that occurs in mid- to late season, is found across the entire cotton belt. The deficiency symptoms occur on young leaves at the top of the plant. Normally the deficiency symptoms are found on the older, mature leaves at the bottom of the plant. This has led to confusion in prompt and correct identification of the problem. This mid-season X deficiency was first reported in Fresno County, California in 1957 (Fullmer and Stromberg, 1961). It was seen in the mid-south near Pickens, Arkansas between 1980 and 1982 (Denver, 1991). Dick Maples, retired Director of the Arkansas Soil Testing and Research Lab, confirmed it as X deficiency in 1984 (Maples, 1988). At about the same time, Alabama scientist were seeing and identifying the problem in Alabama cotton fields, especially those that had recently come out of bermudagrass hay meadows. The symptoms were clearly defined by Maples (Maples, et al., 1989).



Reprinted from 1993 Proceedings Beltwide Cotton Conferences pp. 126 - 127
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998