Irrigation Has Cultivar-Specific Effects on Cotton Boll Distribution.

Upland cotton (Gossypium hirsutum L.) is an indeterminate crop, and the relative production of fruit on different fruiting sites varies with environment, cultivar, and management practices, most particularly irrigation level. Differences in boll distribution among ten irrigation treatments (0 to 6.5 mm day^-1) and six cultivars (DP0912, DP1212, DP1219, FM2484, FM2011, and PHY499) were analyzed over three years on the Texas High Plains. Environmental differences and rainfall, cultivar and irrigation during the growing season  contributed to differences in boll accumulation and overall boll distribution during the three year study period.