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No-Tillage Coulter, Residue Finger and Closing Wheel Effects on Plant Stand and Yield

J. R. Smart and J. M. Bradford


 
ABSTRACT

Producers in south Texas are adopting conservation tillage practices but at times have difficulty establishing cotton in heavy crop residue from the previous crop. The objective of this study was to evaluate the effects of six different residue finger/coulter combinations over a two year period and 10 different closing wheel combinations on plant population and crop yield. Studies were conducted in 1998 and 1999 with six different coulter/residue finger combinations to aid in seed placement in heavy crop residue conditions and in 1999 with 10 different closing wheel types and configurations in no-tillage corn residue for both corn and cotton. Although one type of residue fingers reduced total plant population in no-tillage corn residue, cotton plant height, leaf stage, lint percentage, or lint yield was not affected. The closing wheel configurations affected crop yield. When a Dawn closing wheel was used without a depth wheel cover plus one conventional rubber wheel, no-tillage cotton yield was reduced 24% compared with using two May-Wes poly closing wheels or one May-Wes poly closing wheel plus one rubber closing wheel.



Reprinted from Proceedings of the 2000 Beltwide Cotton Conferences pp. 1408 - 1412
©National Cotton Council, Memphis TN

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Document last modified Saturday, Jun 17 2000