Fig. 3. Potato tuber total- and grade-weight yields in 2000 after (A) two rotation cycles (Exp. A) and (B) one rotation cycle (Exp. B). Treatment least-squares means within an experiment and yield category (total yield, premium yield, small marketable yield, and unmarketable yield) with the same letter are not significantly different at the 0.05 probability level. Rye-NF, rye rotation without fumigation; rye-F, rye rotation with fumigation; CGPMH-1, Canadian Grain Pearl Millet Hybrid 1; CFPM 101, Canadian Forage Pearl Millet Hybrid 101; CFSH-17, Canadian Forage Sorghum Hybrid 17.