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Relationships between Insufficient Potassium and Crop Maturity in Cotton

USDA-ARS, Crop Genetics and Production Research Unit, P.O. Box 345, 141 Experiment Station Road, Stoneville, MS 38776

View larger version (31K): [in a new window]   Fig. 1. White blooms (blooms at anthesis) m-2 of ground area at various times throughout the 1995 to 1997 growing seasons in plots of the cotton genotypes MD 51 ne normal leaftype, MD 51 ne okra leaftype, Stv. 6413 normal leaftype, and Stv. 6413 okra leaftype. The genotype means were averaged across two K fertility treatments. Vertical bars denote LSD values at the 0.05 level and are present only when the differences between genotypes are statistically significant at the 0.05 level.

View larger version (52K): [in a new window]   Fig. 2. Percentage photosynthetic photon flux densities (PPFD) intercepted by cotton canopies grown with either 0 or 112 kg K ha-1 at various times throughout the 1995 to 1997 growing seasons. The K fertility treatment means were averaged across genotypes. Vertical bars denote LSD values at the 0.05 level and are present only when the differences between K fertility treatments are statistically significant at the 0.05 level.

View larger version (25K): [in a new window]   Fig. 3. White blooms (blooms at anthesis) m-2 of ground area at various time throughout the 1995 to 1997 growing seasons in plants grown with either 0 or 112 kg K ha-1. The K fertility treatment means were averaged across genotypes. Vertical bars denote LSD values at the 0.05 level and are present only when the differences between K fertility treatments are statistically significant at the 0.05 level.