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Fig. 2. (a) Orchardgrass, (b) bluegrass, and (c) quackgrass tiller stage of development in spring in a mixed pasture rotationally grazed with cow–calf pairs under tall or short grazing height regimes at State College, PA. In the tall and short grazing regimes, orchardgrass and quackgrass were harvested at 7 and 5 cm, respectively, and bluegrass was harvested at 5 and 3 cm, respectively. Bluegrass percentage of flowering tillers differed significantly between regimes at P < 0.05. Orchardgrass and quackgrass percentage of flowering tillers did not differ significantly between grazing regimes.
