http://hdl.handle.net/10150/198990 Wed, 22 May 2013 05:14:45 GMT 2013-05-22T05:14:45Z http://arizona.openrepository.com:80/arizona/retrieve/408079/Cotton.jpg http://hdl.handle.net/10150/198990 http://hdl.handle.net/10150/209586 Title: Cottonseed Treatment Evaluations in Arizona, 1992 Author: Silvertooth, J. C.; Malcuit, J. E. Editors: Silvertooth, Jeff Abstract: Field experiments were conducted at three locations in Arizona (Maricopa, Marana, Safford) to evaluate 9 cottonseed treatments on Upland cotton (G. hirsutum L.). Stand counts were taken to evaluate the effectiveness of each treatment. Statistical analysis showed no significant differences among the treatments used at the Maricopa location. Significant differences were found among the treatments used at the Marana and Safford locations. Mon, 01 Mar 1993 00:00:00 GMT http://hdl.handle.net/10150/209586 1993-03-01T00:00:00Z http://hdl.handle.net/10150/209585 Title: Germination and Respiration of Cotton Seed Produced in Arizona Author: Dobrenz, Albert K.; Silvertooth, Jeffrey C.; Martin, Jill Editors: Silvertooth, Jeff Abstract: The germination percentage and seedling respiration were evaluated on 11 cultivars of Cotton produced in Arizona. Respiration rates of 5-day old seedlings ranged from 6.0 to 16.9 mg /g⁻¹ hr⁻¹ for DP -5690 and KC-311, respectively. Germination percentage ranged from 31 to 87% for KC-311 and DP-51, respectively. A significant negative correlation (r = -.90) between respiration rates and the germination percentage indicates that seed quality is closely associated with early seedling metabolic rates. Mon, 01 Mar 1993 00:00:00 GMT http://hdl.handle.net/10150/209585 1993-03-01T00:00:00Z http://hdl.handle.net/10150/209584 Title: Cotton Farmer Ratings of Tillage Systems: Important Characteristics and Perceptions of Alternate Systems Author: Thacker, Gary W.; Coates, Wayne E. Editors: Silvertooth, Jeff Abstract: In a mail survey, we asked Arizona cotton growers which characteristics of a tillage system are important to them. Burial of crop residue, low cost, easy maintenance, reliability, low field work time, and breaking insect life cycles were all rated as important characteristics. Dust control was rated as not important. In rating their perceptions of conventional and alternative tillage systems, cotton farmers indicated that they were not completely satisfied with any of the currently available tillage alternatives. Mon, 01 Mar 1993 00:00:00 GMT http://hdl.handle.net/10150/209584 1993-03-01T00:00:00Z http://hdl.handle.net/10150/209583 Title: A Comparison of Three Cotton Tillage Systems Author: Coates, Wayne E.; Thacker, Gary W. Editors: Silvertooth, Jeff Abstract: Two reduced cotton tillage systems, both of which utilize controlled traffic farming techniques, are being compared to a conventional tillage system in terms of energy requirements, field work time requirements, crop yield, and operating costs. Four seasons of testing show the Sundance system to have the lowest energy requirement of 28.2 HpHr /Ac, the Uprooter-Shredder-Mulcher (USM) the second lowest at 40.5 HpHr /Ac, and conventional tillage the highest at 54.4 HpHr /Ac. Field work times of the two reduced tillage systems are about one-half that of conventional tillage. Costs of the two reduced tillage systems are lower than for conventional tillage. We have never measured a significantly lower lint yield with either of the two reduced tillage systems, relative to conventional tillage. Mon, 01 Mar 1993 00:00:00 GMT http://hdl.handle.net/10150/209583 1993-03-01T00:00:00Z