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GRAIN SORGHUM PERFORMANCE TRIALS IN OKLAHOMA, 2005 PRODUCTION TECHNOLOGY CROPS OKLAHOMA COOPERATIVE EXTENSION SERVICE DEPARTMENT OF PLANT AND SOIL SCIENCES DIVISION OF AGRICULTURAL SCIENCES & NATURAL RESOURCES OKLAHOMA STATE UNIVERSITY PT 2005-18 November 2005 Vol. 17, No.18 Rick Kochenower Area Research and Extension Specialist Plant and Soil Sciences Department TRIAL OBJECTIVES AND PROCEDURES Each year, performance trials for hybrid grain sorghums are conducted by the Oklahoma Cooperative Extension Service to provide producers, extension educators, industry representatives, and researchers with information for hybrid grain sorghums marketed in Oklahoma. Performance trials are conducted at eight locations in Oklahoma: Altus, Blackwell, Cherokee, Enid, Goodwell, Homestead, Keyes, and Tipton. Dry-land trials are conducted at all locations, with an additional irrigated trial at Goodwell. The Cherokee and Homestead locations are unique trials to evaluate certain hybrids (generally early and medium maturity) for planting in late April. In 2004 a trial was established at Enid to evaluate hybrids for use as a double crop. All trial locations also have DK-44 and KS 585 planted with and without (WO) seed applied insecticide to determine the affect of these treatments. Grain sorghum hybrids entered (Table 1) were assigned by companies to their respective maturity groups (early, medium, and late) and trial locations, therefore, all hybrids are not in all locations. Hybrids tested at the Cherokee, Homestead, and Enid locations were determined by Oklahoma State University. Companies submitted all hybrid characteristics presented in Table 1. This information was not determined or verified by Oklahoma State University. Company participation was voluntary; therefore some hybrids marketed in Oklahoma were not included in the test. Each maturity group was tested in a randomized complete block design with four replications. Plots were 2 30-inch rows by 25 feet. Plots were trimmed to 20 feet prior to harvest. Target populations, cooperating producers, fertilization, cultural practices, soil series, and herbicide use on all trials are listed with the results tables. Rainfall data from the nearest Mesonet site is also listed. Some trials are long distances from the nearest Mesonet site, therefore rainfall could be greater or less than reported. In 2005 only in-season rainfall is reported instead of yearly as in the past. Tractor powered cone planters were used to plant all trials with seeding rates adjusted for trial location. Trials were harvested with a (Massey-Ferguson 8) plot combine. GROWING CONDITIONS Moisture Soil moisture conditions were poor for early-planted sorghum (mid April to early May) for most of the Highlights The highest dryland grain yields in the last 8 years of trials were harvested in 2005. The highest yielding hybrids at Cherokee and Keyes were 136.6 and 135.3 bu/ac respectively. The high yields were due to timely rainfall at critical periods of plant development and sufficient nitrogen fertilizer. The trial at Cherokee averaged 111.0 bu/ac while the medium/full season maturities at Keyes averaged 108.2 bu/ac. The trial at Homestead was dusted in, and when adequate rainfall occurred for emergence the stand was inadequate so the trial was abandoned.
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Title | sorghumnov05 1 |
Full text | GRAIN SORGHUM PERFORMANCE TRIALS IN OKLAHOMA, 2005 PRODUCTION TECHNOLOGY CROPS OKLAHOMA COOPERATIVE EXTENSION SERVICE DEPARTMENT OF PLANT AND SOIL SCIENCES DIVISION OF AGRICULTURAL SCIENCES & NATURAL RESOURCES OKLAHOMA STATE UNIVERSITY PT 2005-18 November 2005 Vol. 17, No.18 Rick Kochenower Area Research and Extension Specialist Plant and Soil Sciences Department TRIAL OBJECTIVES AND PROCEDURES Each year, performance trials for hybrid grain sorghums are conducted by the Oklahoma Cooperative Extension Service to provide producers, extension educators, industry representatives, and researchers with information for hybrid grain sorghums marketed in Oklahoma. Performance trials are conducted at eight locations in Oklahoma: Altus, Blackwell, Cherokee, Enid, Goodwell, Homestead, Keyes, and Tipton. Dry-land trials are conducted at all locations, with an additional irrigated trial at Goodwell. The Cherokee and Homestead locations are unique trials to evaluate certain hybrids (generally early and medium maturity) for planting in late April. In 2004 a trial was established at Enid to evaluate hybrids for use as a double crop. All trial locations also have DK-44 and KS 585 planted with and without (WO) seed applied insecticide to determine the affect of these treatments. Grain sorghum hybrids entered (Table 1) were assigned by companies to their respective maturity groups (early, medium, and late) and trial locations, therefore, all hybrids are not in all locations. Hybrids tested at the Cherokee, Homestead, and Enid locations were determined by Oklahoma State University. Companies submitted all hybrid characteristics presented in Table 1. This information was not determined or verified by Oklahoma State University. Company participation was voluntary; therefore some hybrids marketed in Oklahoma were not included in the test. Each maturity group was tested in a randomized complete block design with four replications. Plots were 2 30-inch rows by 25 feet. Plots were trimmed to 20 feet prior to harvest. Target populations, cooperating producers, fertilization, cultural practices, soil series, and herbicide use on all trials are listed with the results tables. Rainfall data from the nearest Mesonet site is also listed. Some trials are long distances from the nearest Mesonet site, therefore rainfall could be greater or less than reported. In 2005 only in-season rainfall is reported instead of yearly as in the past. Tractor powered cone planters were used to plant all trials with seeding rates adjusted for trial location. Trials were harvested with a (Massey-Ferguson 8) plot combine. GROWING CONDITIONS Moisture Soil moisture conditions were poor for early-planted sorghum (mid April to early May) for most of the Highlights The highest dryland grain yields in the last 8 years of trials were harvested in 2005. The highest yielding hybrids at Cherokee and Keyes were 136.6 and 135.3 bu/ac respectively. The high yields were due to timely rainfall at critical periods of plant development and sufficient nitrogen fertilizer. The trial at Cherokee averaged 111.0 bu/ac while the medium/full season maturities at Keyes averaged 108.2 bu/ac. The trial at Homestead was dusted in, and when adequate rainfall occurred for emergence the stand was inadequate so the trial was abandoned. |
Date created | 2012-07-18 |
Date modified | 2012-07-18 |