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United States Department of Agriculture

Agricultural Research Service

Title: Tillage, Cover Crop, and N Effects on Cotton Grown in 19-Cm Row Widths

Authors
item BAUER, PHILIP
item Reeves, Donald
item Johnson, R - TEXAS TECH UNIV

Submitted to: World Cotton Research Conference Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: June 29, 1998
Publication Date: N/A

Technical Abstract: In some areas of the USA where cotton is traditionally harvested with a spindle picker, there is widespread interest in producing cotton in narrow rows and harvesting with a stripper harvester. This study was conducted to determine the effects of residue management and nitrogen fertilization on cotton grown in 19-cm row widths. Similar experiments were conducted in Florence, SC, and Auburn, AL. Treatments at both locations 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). The cereal cover crop was Avena strigosa at Florence and an Avena strigosa/Secale cereale mixture at Auburn. The legume cover crop was Pisum sativum at Florence and Lupinus albus at Auburn. Plant populations were approximately 290,000 plants/ha at Florence and 370,000 plants/ha at Auburn. 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 Florence, lint yield ranged from 670 to 1340 kg/ha in 1996 and 336 to 900 kg/ha in 1997. At Auburn, lint yield ranged from 660 to 1570 kg/ha in 1996 and 450 to 1140 kg/ha in 1997. 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. As expected, yield was related to bolls per unit area. Plant morphological characteristics at harvest and fiber properties will be presented.

Last Modified: 7/28/2014
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