• Raised Bed Alfalfa Varietal Production in La Paz County, Arizona, 1993-1995

      Winans, S. Sherwood; Rethwisch, Michael; Esquerra, Deb; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1996-10)
      Twenty alfalfa varieties grown in small plots on raised beds were evaluated for forage production beginning after planting in the fall of 1992. Data from eleven harvests were obtained in 1993 -1995, generally covering the summer months. No variety produced more forage than CUF 101 in each of the three years although Moapa had more tonnage than CUF 101 in two of the years. Moapa and Tillman (101.6% and 100.8% of CUF 101 respectively) had higher total production than CUF 101 during the study, although Tillman had the least production of varieties tested during the third year. The varieties Rio and WL 516 had least amounts of forage production over the three year period. Percentage bloom and plant height were very highly correlated from the July 1993 harvest. Total production from 1993-1994 were similar to the bloom and height of July 1993, as Tillman, Moapa and CUF 101 had the highest percentage bloom, while Rio and WL 516 had the least bloom. Cibola and CW 2981 had greater than 240, 000 crowns per acre following the 1994 season, followed by Tillman and Condor. WL 516, Madera, and ABI 9182 each had fewer than 180,000 crowns per acre. Tillman and Cibola had greater than 120,000 crowns /acre at the end of the third year; all other varieties had fewer. Hopperburn and associated yellows during the fall of 1995 was correlated with both crowns /acre and plant height, although crown numbers and height were not correlated.
    • The Response of Lesquerella to Nitrogen Fertilizer Rate and Time of Application

      Nelson, J. M.; Hart, G. L.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1996-10)
      Lesquerella is a plant that grows in the wild in southwestern U.S. and produces seeds containing hydroxy fatty acids similar to those in castor beans. Research has indicated that lesquerella has potential as a crop plant for Arizona. An important step in the commercialization of this plant for Arizona farms is the development of an efficient agronomic production system. Research to determine the effect of nitrogen (N) rates and timing of N applications on lesquerella production was conducted at the Maricopa Agricultural Center in the 1993 -94 and 1995 -96 seasons. Nitrogen application rates of 0 to 108 and 0 to 162 lbs. N /acre were evaluated in 1993 -94 and 1995 -96 tests, respectively. Seed yields as high as 1780 lbs. /acre were obtained in the 1995 -96 test using a conventional combine for harvest. In both tests, lesquerella biomass production and seed yields increased as the N rate was increased. In 1995 -96, a split application of N in March and April resulted in higher seed yields than a single application in March. Seed oil content decreased in both tests as the N rate was increased. In 1995 -96, seed oil content decreased 12% as the N rate was increased from 0 to 162 lbs. N /acre. The N application rate had no effect on 1000 -seed weight.
    • Silage Corn Variety Trial in Greenlee County, 1995

      Clark, Lee J.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1996-10)
      Five yellow corn hybrids were compared for silage yield at the Lunt dairy in Greenlee county. Silage yields, several agronomic variables and nutritional variables are also reported. Funks G4673B was the highest yielding hybrid in the trial with a silage yield over 33 tons per acre and net energy of lactation value over 13,000 megacalories per acre.
    • Small Grains Variety Evaluation at the Maricopa Agricultural Center, 1995 (Final Report)

      Ottman, M. J.; Hareland, G.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1996-10)
    • Small Grains Variety Evaluation at the Maricopa Agricultural Center, 1996

      Ottman, M. J.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1996-10)
    • Small Grains Variety Trials, Safford Agricultural Center, 1995

      Clark, L. J.; Carpenter, E. W.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1996-10)
      Eight varieties of durum wheat, seven varieties of barley and four varieties of bread/feed wheat were grown in a replicated small plot study on the Safford Agricultural Center in the 1995 growing season. The results of this study are reported in this paper.
    • Sudangrass Variety Evaluation at La Paz County, 1996 (Preliminary)

      Knowles, Tim C.; Ottman, Michael J.; Lloyd, Jim; Quist, Aron; Rethwisch, Michael; Esquerra, Deb; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1996-10)
      Two common (Piper and Sweet Sudan), four hybrid sudangrass (NK Trudan 8, Cargill HS 35, and Germaine's G 555), and three sorghum-sudangrass hybrid (DK SX 17, TE Haygrazer II, and Pioneer 877F) varieties are currently being evaluated for hay yield and quality at four cuttings in large field plots located at Quail Mesa Farms in southwest La Paz County. Preliminary results from the first two hay cuttings are presented showing that of the nine sudangrass varieties examined in this study, Piper, Cargill HS 35, and NC+ 200 sudangrass varieties had superior hay tonnage and quality. However, we need to determine if this pattern of hay tonnage and quality can be maintained over at least four hay cuttings. The sorghum-sudangrass hybrids produced relatively poor quality hay, and had relatively high prussic acid levels at the second cutting.
    • Wheat, Barley, and Durum and Advanced Lines Test, Gila Bend, AZ, 1996

      Jech, L. E.; Husman, S. H.; Ottman, M. J.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1996-10)
    • Wheat, Barley, Durum and Advanced Lines Test, Gila Bend, AZ 1995 (Final Report)

      Jech, L. E.; Husman, S. H.; Ottman, M. J.; Hareland, G. A.; Ottman, Michael (College of Agriculture, University of Arizona (Tucson, AZ), 1996-10)