http://hdl.handle.net/10150/146311 2026-06-13T18:22:19Z http://hdl.handle.net/10150/201370 Pinto Bean Variety Demonstration in Bonita, Graham County, 1989 Clark, L. J.; Schwennesen, E.; Cluff, R. E. Ottman, Michael; Bantlin, Marguerite Six pinto bean varieties were tested in the Bonita area of Graham county with excellent results, three of these varieties yielded over 3000 pounds per acre. These yields coupled with bean values above 30 cents per pound have created considerable interest in growing dry beans in Cochise and parts of Graham county. 1990-09-01T00:00:00Z http://hdl.handle.net/10150/201369 Double Crop Corn Hyrbrid Evaluations, Graham County, 1989 Clark, Lee J.; Cluff, Ronald, E. Ottman, Michael; Bantlin, Marguerite Ten corn hybrids of widely differing maturities were planted in Graham county to find which maturity would be optimal for double crop corn production. The highest yielding hybrid was the quickest maturing with a relative maturity of 98 days, it yielded 5629 pounds per acre. 1990-09-01T00:00:00Z http://hdl.handle.net/10150/201350 Corn Hybrid Evaluations in Cochise County, 1989 Clark, L. J.; Schwennesen, E. Ottman, Michael; Bantlin, Marguerite Corn yields were decreased in 1989 compared to 1988. The highest yielding yellow corn produced less than 10,000 pounds per acre. The weather was considered the largest factor in the yield reduction. Yellow corn hybrids were grown in two sites with two different cooperators. Yield differences may have been due to cultural practices. An auxiliary study on plant populations is also included in this report. 1990-09-01T00:00:00Z http://hdl.handle.net/10150/201349 Scheduling Wheat Irrigations Using Infrared Thermometers and the Crop Water Stress Index in Arizona Garrot, D. J. Jr.; Ottman, M. J.; Fangmeier, D. D.; Husman, S. H.; Harper, J. M. Ottman, Michael; Bantlin, Marguerite Durum wheat (Triticum turgidum L. var. durum ) is grown as a winter annual crop, normally in rotation with cotton, and in 1989, comprised 121,500 acres in Arizona. Winter rainfall is insignificant, therefore water is supplied totally through surface irrigation. The relationship between the timing and amount of irrigation water applied and grain yields have not been well -defined Field plot studies were conducted in 1986 and 1987 to test the feasibility of using the Crop Water Stress Index (CWSI) to time wheat irrigations and also to determine the relationship among the CWSI, grain production, and water applied The study was repeated at the commercial production level with a grower cooperator in 1989 to determine the usefulness of CWSI scheduling on large farms. Highest grain production was attained when irrigations were scheduled when the CWSI averaged 0.37 and 0.30 units on small plots for 1986 and 1987, respectively. At the grower production level, highest yields were attained when irrigations were scheduled when the CWSI averaged 0.17 units. In 1986 and 1987 scheduling irrigations at lower CWSI values did not significantly increase grain production while requiring more applied water than the optimum CWSI values. Scheduling irrigations at CWSI's exceeding the optimum values did significantly reduce grain production from the optimum, but required less applied water in all three years. 1990-09-01T00:00:00Z