Physiological Response of Cotton to Tillage

W. E. Hart, T. E. Morgan, F. D. Tompkins, and J. F. Bradley


 
ABSTRACT

Effects of tillage practices and application of the growth regulator Pix® on cotton physiological properties and yield were evaluated in a 1993 field study. Tillage practices included no-till and conventional tillage with three levels of post emergence cultivation (single, double, and triple) utilized during the production season. There were virtually no discernible difference in the average number of days between planting and seedling emergence for no-till and conventionally tilled treatments. Average plant densities were 2.0 and 2.5 plants per foot for no-till and conventionally tilled treatments, respectively. No-till treatments averaged 2.45 squares per plant and conventionally tilled treatments average 2.35 squares per plant 49 days after planting. Plant stem diameters and terminal heights measured at 129 days after planting were not significantly affected by tillage treatment or application of the growth regulator Pix®. Average stem diameters were negatively correlated with plant stand density. There were no discernible differences between the number of open bolls per plant between tillage treatments 129 days after planting. Lint yield was not significantly affected by tillage treatment. Lint yield was positively correlated with plant stand density. Application of the growth regulator Pix® did not significantly ( =0.05) affect lint yields observed across the various tillage treatment combinations, although application of Pix® produced a 78 pound per acre yield advantage.



Reprinted from Proceedings of the 1994 Beltwide Cotton Conferences pp. 535 - 538
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998