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Plant Population Study on Double Row and Conventional 30" Cotton in Tulare County, California

Steve Wright, Gerardo Banuelos, Shelly Elam, Bob Hutmacher, Mark Keeley, Raul Delgado, and Anil Shrestha

ABSTRACT

Studies were conducted in 2002 and 2003 to compare different plant densities in double row and single row thirty-inch bed cotton near Visalia, California. For 2002, the double row had final plant densities of 22, 36, and 50 thousand plants per acre. The single row had 47, 75, and 83 thousand plants per acre. Higher densities were attempted but there was approximately 40 percent stand loss using the Great Plains planter in 2002. In 2003, the double row had 44, 61, and 72 thousand plants per acre using a “Monosem” planter. The single row had 30, 43, 59, and 80 thousand plants per acre. Light readings showed that double row cotton intercepted more light early in the season and about 5-6 days ahead in terms of light interception. In 2002 there were not significant lint yield differences between double row cotton on 22, 36, or 50 thousand plants per acre or single row thirty inch at 47 thousand plants per acre. Single row densities of 72 or 83 thousand plants per acre significantly reduced yields. In 2003, there were not significant differences between double row 30-inch cotton with densities from 44 to 72 thousand plants per acre and single row 30-inch cotton with densities of 30 to 80 thousand plants per acre. There were no significant differences between mepiquat chloride application treatments in either year.





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Document last modified 04/27/04