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Figure 1. Interactions of year x between-row spacing (left-hand column) and year x within-row spacing (right-hand column) for seed yields in three cultivars (WL232HQ, Derby, and Algonquin). Data for between-row spacing treatments are pooled across within-row spacing treatments, and data for within-row spacing treatments are pooled across between-row spacing treatments under each cultivar. Means represented by bars with different letters in each graph and each year are significantly different at P 0.05.
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