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Vegetative cover (least square mean estimates ± SE) for each ecotype at planting sites across the Great Plains precipitation gradient at 0.35 GDD (4A) and 0.65 GDD (4B), corresponding to the earliest and latest time point in the growing season (i.e. 35%, 65%) for which inference is granted in all four sites. CKS = central KS ecotype (circle), EKS = eastern KS ecotype (square), SIL = southern Illinois ecotype (diamond).
