|Johnson, R - TEXAS TECH UNIV|
Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: July 15, 1998
Publication Date: N/A
Technical Abstract: New technologies have provided optimism for the production of cotton (Gossypium hirsutum L.) in row widths of 25 cm or less in the SE USA. Tillage and N management information for this production system is needed. Experiments were conducted at Florence, SC, and Auburn, AL, to determine the effects of residue management and nitrogen fertilization on cotton grown in 19-cm-row widths. Treatments were tillage system (chisel plowing plus disking vs. no-till), winter cover crops (cereal, legume, or none), and N fertilizer rates (0, 45, 90, 135 kg N/ha). Although tillage system had a small effect on most variables, the availability of N (either through fertilizer or cover crop) had the greatest impact on measured variables. At both locations, optimum N rate for cotton following either no cover crop or following the winter cereal was between 45 and 90 kg/ha, while there was little difference among the four N rates for the cotton grown after the legumes. Both years, fibers were short at Florence and had low micronaire at Auburn. Otherwise, fiber properties were acceptable.