Response of Fast Fruiting Cotton Cultivars to Nitrogen on a Clayey Soil

Abstract

The present cotton (Gossypium hirsutum L.) N recommendations for Arkansas were developed primarily on silt loam and sandy loam soils, but interest in cotton production on clayey soils has increased. The objective of this study was to determine the appropriate quantity of N for the new faster fruiting cotton cultivars grown on clayey soils. Experiments were conducted from 1988 to 1990 on a Sharkey silty clay (very fine, montmorillonitic, nonacid, thermic, Vertic Haplaquept) at Keiser, AR. The response of cotton cultivars 'Deltapine 20', 'Deltapine 5O', 'Stoneville 453', and 'Stoneville 506' were evaluated at five N rates (O, 50, 100, 150, and 200 lb/acre). Cultivars were found to respond similarly to increasing N fertilizer. These cultivars yielded differently each year but averaged the same across years []