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Fig. 3. Box plots of soybean cyst nematode (A) cyst population density and (C) eggs per cyst in Field A and (B) cyst population density and (D) eggs per cyst in Field B. The y axis indicates the sampling time: P '99, planting 1999; H '99, harvest 1999; P '00, planting 2000; and H '00, harvest 2000. The sample mean is indicated with a dashed vertical line and the median with a solid vertical line in each box. Significant differences among the means at different sampling times within each field are indicated with lowercase letters. Mean comparisons were performed on logarithmic-transformed data; original data are shown for clarity. Means with the same letter were not significantly different (protected LSD, 0.05 significance level).
