2005 Dry Bean Performance Testing Results
March 29, 2006
Following are dry bean performance testing results completed in 2005 along with variety descriptions, compiled by Duane Berglund, extension agronomist, North Dakota State University. Reported here are trials conducted in Minnesota at Perham and North Dakota at Hatton, Forest River, Carrington, Minot, and Pembina County, near Cavalier. Complete results, including trials at Prosper (which had flooding injury and incidences of bacterial blight throughout) Langdon, Williston, other locations near Minot, and an irrigated trial at Carrington, can be found in NDSU Extension Bulletin A-654 North Dakota Dry Bean Performance Testing 2005 available at county extension offices. Results can also be found online at: www.ag.ndsu.nodak.edu/aginfo/variety/drybean.htm.
Michigan dry bean variety trial results can be found online at www.css.msu.edu/VarietyTrials/Index.html.
Test trials in North Dakota and Minnesota are supported in part by fees collected from entrants of private varieties, as well as the Northarvest Bean Growers Association, North Dakota Dry Bean Council and the Minnesota Dry Bean Research and Promotion Council with checkoff funds.
Making Sense of Hybrid Statistics
Mean refers to the average number for a particular trait or characteristic evaluated in the trial.
Coefficient of variability (C.V. %) is a relative measure of the amount of variation or consistency recorded for a particular trait, expressed as a percentage of the mean. Generally, trials with low C.V. rates are more reliable for making hybrid choices than trials with higher C.V. rates. Trials with C.V. rates below 15-20% are generally considered to be reliable for comparing yield.
Least significant difference (LSD 5%) Use this to accurately determine if one variety is better than another for a given trait. This is a statistical way to indicate if a trait such as yield differs when comparing two hybrids. If two hybrids differ by more than the indicated LSD 5% value for a given trait, they would most likely differ again when grown under similar conditions. If two varieties differ by less than the LSD for a particular trait, then theres no statistical difference.
For example, if a performance trial table indicates one bean variety yielded 2,000 lbs/acre compared to another variety in the same plot that yielded 1,785 lbs/acre, and the LSD for this particular plot trial data is 325 lbs/acre, there is no statistical difference in yield between the two varieties. There would be a statistical yield difference, however, between a variety that yielded 2,000 lbs and another that yielded 1675 lbs.
Its best to compare relative performance of a variety over many years and locations. Consult with an agronomist or your local seed dealer for more specific variety information.