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Sensitivity of Early-Maturing Varieties to Potassium Deficiency

G.R. Tupper, D.S. Calhoun, M. Wayne Ebelhar


Early maturing cotton varieties are more sensitive to potash deficiencies than late maturing varieties. Lint yields of the earliest maturing varieties were not maximized by yearly applications of 240 lb K2O/A for 6 years. However, lint yield for the latest maturing variety was maximized with the 120 lb K2O/A rate. Lint yield response to potassium generally increased with increasing earliness of varieties, as indicated by the reduced number of nodes above the uppermost first position cracked boll to the terminal for the earlier varieties.

Reprinted from Proceedings of the 1996 Beltwide Cotton Conferences pp. 625 - 628
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998