| influence of yeast culture supplementation and advancing season on steers grazing mixed-grass prairie in the northern great plains: i. dietary composition, intake, and in situ nutrient disappearance. | twelve beef steers (368 +/- 25.3 kg) and four beef heifers (559 +/- 79.5 kg) fitted with ruminal cannulas were used to evaluate effects of yeast culture (yc) and advancing season on dietary chemical composition, intake, and in situ cp and ndf degradation. treatments were control and yc supplementation (28.4 g.steer-1.d-1 dosed ruminally). steers grazed from late june to early november 1991 on mixed-grass prairie. experimental periods consisted of 10 d for adaptation and a 13-d collection phase. ... | 1994 | 7982846 |