Fig. 3. Experimental design and results for Washington, 2001. (A) Experimental design. Source plot was 0.4 ha (32 by 136 m), surrounded by a border of male-sterile maize 18 m wide. Receptor plots were planted at weekly intervals after the source plot. (B) Total xenia kernels from all replicates of the receptor plots at each planting interval are shown. Approximately 17.7 million kernels were evaluated.