How to interpret the variety trials data

Variety classifications 

Varieties are listed in the tables alphabetically. Seed of tested varieties can be eligible for certification, and the use of certified seed is encouraged. However, certification does not imply a recommendation.

Interpretation of the data 

The presented data are the preliminary variety trial information for single and multiple year comparisons in Minnesota. The yields are reported as a percentage of the location mean, with the overall mean (bu/acre) listed below. Two-year and especially one-year data are less reliable and should be interpreted with caution. In contrast, averages across multiple environments, whether they are different years and/or locations, provide a more reliable estimate of mean performance and are more predictive of what you may expect from the variety of the next growing season. 

The least significant difference or LSD is a statistical method to determine whether the observed yield difference between any two varieties is true, genetic differences between the varieties, or experimental error. If the difference in yield between two varieties equals or exceeds the LSD value, the higher-yielding one was indeed superior in yield. If the difference is less, the yield difference may have been due to chance rather than genetic differences, and we are unable to differentiate the two varieties. The 10% unit indicates that, with 90% confidence, the observed difference is indeed a true difference in performance. Lowering this confidence level will allow more varieties to appear different from each other and increase the chances that false conclusions are drawn.