Fig. 1. (A) The mean of the five highest yielding entries from each site and year expressed as a percentage of the trial mean ( %TM) compared with change in the trial mean (TM) and local check mean (LC): ESWYT sites yielding less than 4 Mg ha^-1. (B) The mean of the five highest yielding entries from each site and year expressed as %TM compared with change in the TM and LC: SAWYT sites yielding less than 4 Mg ha^-1.

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