The 2013 Arkansas Corn Standardized County Hybrid Trials Report is now available under the publications tab of the Arkansas Row Crop Blog in the corn section.
The 2013 growing season was the sixth year for the Corn Standardized County Hybrid Trial Program. The program’s goal is to increase knowledge on selected hybrids that are being evaluated in the University of Arkansas Corn Hybrid testing program (http://www.arkansasvarietytesting.com/). The trials were a collaborative effort between growers, County Extension agents, Extension specialists, and industry representatives. In the trials, producers followed their normal production practices they use on their farms. The cooperation of all producers mentioned in this publication is appreciated. Producers donate time, equipment and hired labor to make these trials possible.
Trials were separated into five districts and within each district hybrids entered were consistent. Districts included the Northeast, Central, Southeast, River Valley and Southwest, representing the major corn producing areas of Arkansas. A map on page 4 shows the counties in each district. Industry representatives and Extension specialists choose hybrids to be entered, but hybrids were required to be commercially available and have been tested/or being tested in the University of Arkansas Corn Hybrid testing program. All hybrid trials were irrigated, and all hybrids were glyphosate tolerant. Relative maturity of hybrids entered ranged from 110 to 120 days. A full list of hybrids entered along with relative maturity and traits can be found on page 34 of the report. Trials were strip trials and were not replicated, but multiple locations within a district do provide useful information on yield and agronomic considerations.
Information collected at each corn trial includes soil type, planting date, agronomic production practices utilized by each producer, final plant population, test weight, grain moisture at harvest, and yield. Plots were planted with producer equipment and typically were eight rows wide by the length of field (500-1500 ft). Grain moisture and test weights were recorded by commercial or hand held grain analysis equipment. Grain yields were adjusted to 15.5% moisture. When lodging occurred visual ratings were taken by County Extension agents, Extension specialists and/or producers.
In 2013, there were 25 trials harvested. Planting dates ranged from March 14 to May 16 with an average planting date of April 18. Planting rates ranged from 30,000 to 36,000 seeds per acre with an average of 33,500. Harvest dates ranged from August 22 to September 28 with an average harvest date of September 13.
The authors would like to express their gratitude to the producers, County Agents, and industry representatives that made these trials possible.