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Spindle Picker 15-Inch Row Pattern Influence on Lint Yield and Plant Characteristics: One Year’s Progress

N.W. Buehring, M.P. Harrison, R.R. Dobbs, M.H. Willcutt, E.P. Columbus, T.C. Needham, and J.B. Phelps

ABSTRACT

A study was initiated in 2002 on a Marietta silt loam soil (Verona, MS) and a Falaya silt loam soil (Falkner, MS) evaluating cotton response to different row pattern production systems. The row patterns used in the study were 15, 30, and 38-inch row solid cotton, 15-inch rows with a 2 x 1 skip row (2 rows of cotton with a 30-inch skip), 15-inch row 2x2 skip row (2 rows with a 45-inch skip), 30-inch rows with a 1 x 1 skip-row (cotton in 60-inch rows), 30-inch rows with a 2 x 1 skip row (2 rows with a 60-inch skip), and 38-inch rows with a 2 x 1 skip row (2 rows with a 76-inch skip). Due to the wet soil condition through most of May, planting had to be delayed until 5/28/03. The first fruiting branch node located on node 6 was not affected by row patterns at both locations. The study mean lint yield at Verona and Falkner were 978 and 867 lb/acre, respectively. The 15-inch row solid cotton produced the highest yield at both locations with yield of 1196 lb/acre of lint at Verona and 995 lb/acre at Falkner. The 15-inch row 2x1 skip, however, produced yield statistically the same as the 15-inch row solid cotton at both locations and were similar in height and stem diameters. The wider skip row patterns most often had lower yield, more green bolls at harvest, larger stem diameters, and more vegetative branches than 15-inch 2x1 skip or 15-inch row solid. At Verona, the 30 and 38-inch row solid cotton, and the 30 and 38-inch (2x1) skip row patterns and 15-inch 2x2 skip row pattern produced lower yield than 15-inch row solid. However, at the Falkner location, 30-inch row solid and 15-inch row 2x1 skip row pattern produced yield equal to 15-inch row solid. The other treatments produced lower yield than 15-inch row solid cotton. HVI and AFIS analysis indicated no row pattern differences. However, micronaire at Falkner ranged from 3.30 to 3.64 compared to 3.65 to 3.89 for Verona. Boll rot and harvest losses showed no treatment differences at both locations. The trend at Falkner was for the wide rows (30 and 38-inch) and the wide skip row pattern to have more boll rot and harvest loss than 15-inch row solid. The trend at Verona was minor differences in boll rot and higher harvest losses for wide rows and wide skip row pattern than the 15-inch row solid.





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Document last modified 04/27/04