Agronomy and Horticulture, Department of
Document Type
Article
Date of this Version
2008
Citation
The Samuel Roberts Noble Foundation, Inc. NF-FO-07-01 (etc.)
Abstract
Introduction
In an effort to assist producers in Oklahoma and Texas judge variety performance, the Noble Foundation has held trials to determine forage and grain yields of commercially available varieties and advanced experimental lines of small grains. The objective of this report is to summarize yields from the 2007-2008 trials.
Trial Procedures
The small grains tests were conducted at the Noble Foundation Dupy Farm near Gene Autry and the Red River Demonstration and Research Farm (RRF) near Burneyville, Okla. Soils were a Dale silt loam at Dupy and a Minco fine sandy loam at RRF. Ten sources contributed entries to the trial (Table 1). The entries were seeded in a clean-tilled seedbed on Oct. 4, 2007, at Dupy and Oct. 2, 2007, at RRF. Each variety was sown at 2,000,000 pure live seed (PLS) per acre, which approximated 90 to 120 lb PLS/acre, depending on the crop and entry. Seeds were drilled in 7-inch rows at a 1-inch planting depth with a HEGE 500 drill. The entries were seeded in two adjacent 5- by 15-foot plots. The adjacent plots represented forage only use and dual purpose forage and grain use. Both plots were harvested at the same time for forage during the fall. Once first hollow stem stage of wheat was reached in the spring, the dual-purpose half was no longer harvested for forage to allow grain production. Plots harvested for forage only were harvested on Dec. 4, Feb. 12, March 14, April 1 and May 16 at Dupy and on Dec. 7, Feb. 18, March 18, April 11 and May 19 at RRF. Plots harvested for forage and grain were harvested for forage on Dec. 4 and Feb. 12 and for grain on June 17 at Dupy. At RRF, plots harvested for forage and grain were harvested for forage on Dec. 7 and Feb. 18 and for grain on June 23. Fertilization at Dupy consisted of preplant incorporation of 80 lb N/acre on Sept. 11 and a topdress application of 80 lb N/acre on Feb. 12. At RRF, plots were topdressed with N at 80 lbs/ac on Feb. 18, 2007. An application of Amber at 0.56 ou/acre was applied on Oct. 5 at Dupy and RRF to control annual ryegrass. The trials were randomized complete block designs with three replications. Entries were blocked by crop and randomized within each replication. Data were analyzed by crop with the general linear models procedure in SAS (Statistical Analysis Software, Cary, N.C.), and means were separated by the least significant difference (LSD) method.