• 2004 Arizona Cotton Growers Breeding Program Preliminary Strains Testing Program

      Husman, S.; White, K.; Tronstad, Russell; Husman, Steve; Norton, Randy (College of Agriculture, University of Arizona (Tucson, AZ), 2005-05)
      An Upland Cotton Breeding Program was initiated in 2001 by the Arizona Cotton Growers Association (ACGA). Major objectives of the breeding program are to develop varieties that produce a superior fiber quality package, high yields, and under a wide range of environmental conditions. In 2004, the seed committee of the ACGA decided to begin an independent testing program in order to quantify the performance of chosen lines developed to date that were meeting the program’s goals. Forty one lines were chosen and evaluated in replicated small plots at two locations including Yuma and Maricopa, AZ. The final data was sorted according to lines that at both locations had a fiber micronaire of 4.9 or less, staple length of 37 or greater, strength of 30 g/tx or greater, a uniformity index of 80 or greater, and yielded in the top 25% of all tested materials. One line was identified according to this criteria, 0122-2033-304.
    • 2004 Low Desert Upland Cotton Advanced Strains Testing Program

      Husman, S.; White, K.; Tronstad, Russell; Husman, Steve; Norton, Randy; University of Arizona Cooperative Extension (College of Agriculture, University of Arizona (Tucson, AZ), 2005-05)
      Upland cotton advanced strains and commercial check varieties were evaluated in replicated field studies at three locations in 2004. The test sites include the AZ locations of Safford, Maricopa, and Yuma. Eight seed companies submitted a maximum of ten advanced strain entries per location. Three commercial check varieties were used at all three sites, and included ST5599BR, DP449BR, and DP448B. Data collected included final plant heights, yield, and fiber quality. The research is conducted in order to develop public unbiased performance data of genetic materials that have moved to the advanced stages of testing and are being considered for commercial release. The data have historically been used to add to seed company databases and assist with commercial release decisions.
    • Arizona Upland Cotton Variety Testing Program, 2004

      Husman, S.; Norton, R.; Norton, E.; Clay, P.; Zerkoune, M.; White, K.; Tronstad, Russell; Husman, Steve; Norton, Randy; University of Arizona Cooperative Extension (College of Agriculture, University of Arizona (Tucson, AZ), 2005-05)
      Each year the University of Arizona conducts variety trials across the state to evaluate the performance of upland cotton varieties. These tests provide unbiased data on the performance of varieties when tested side-by-side under typical production practices. In 2004 we planted a total of 11 trials, two in the Yuma region (Yuma County), two in the western region (LaPaz and Mohave counties), four in the central region (Maricopa and Pinal counties), one in the southern region (Pima county), and two in the eastern region (Graham and Cochise counties). We tested seven to eight commercially available varieties at each test site.
    • Twin Line Cotton Production in a Conservation Tillage System

      Husman, S.; Clay, P.; Taylor, E.; White, K.; Tronstad, Russell; Husman, Steve; Norton, Randy; University of Arizona Cooperative Extension (College of Agriculture, University of Arizona (Tucson, AZ), 2005-05)
      Two experiments were conducted in 2004 evaluating twin line cotton production using a conservation tillage system approach. DPL 451 BR Upland cotton was planted into oat hay stubble on April 30 and May 5, 2004 at commercial cooperator sites at Tonopah and Tolleson AZ, respectively. The two primary experimental objectives were to determine whether cotton planted into previous crop residue initiated fruiting on the mainstem once the cotton seedling grew above the crop stubble and whether there were differences in lint yield between the single and twin line system. Previous twin line cotton production research had been conducted by authors at 30 locations from 2001-2003. In almost all cases, the harvest of low set bolls presented problems with the twin line system. In 2004, the initiation of the first fruiting branch was independent of the stubble height at both locations. In addition, there were no differences in lint yield in either a single or twin line cotton production system when planting into previous crop residue using conservation tillage.