FIGURE 1.

Satellite photograph of the field site in Laramie WY (centered on 41.3196 N, 105.56 W) showing the three blocks used for each growing season (A). Root architecture photographs for cultivars of summer oilseed (B), Chinese cabbage (C), and vegetable turnip (D). BB (weed) crops physically resemble summer oilseeds. Variation in average minimum volumetric water content (VWC) across blocks 4–6 in the 2014 experiments is depicted. Letters denote significantly different block effects via a post hoc Tukey’s test (E).