Nitrogen Fertilization of Cotton Cultivars of Differing Maturity

Management of N nutrition of cotton (Gossypium hirsutum L.) is one of the most critical aspects of successful cotton production, but growth and yield responses of individual cotton cultivars to N fertilization is relatively unknown. The objective of this research was to evaluate the responses of three cotton cultivars (Arkot 518, Stoneville 453, and Deltapine 90) to soil-applied N fertilization rates. The study was conducted for 3 yr on a Hebert silt loam soil (fine-silty, mixed, thermic Aeric Ochraqualf). Few significant (α = 0.05) cultivar × N rate interaction differences were found, although main effects of the N treatments and the cultivars were evident. The most pronounced responses of the cotton were found as an effect of the N-fertilization treatments [...]