Fifty-two pregnant Hereford and Angus cows, divided according to weight and age into two equal groups, were compared as to their weight changes when grazed on weathered range and fed either soya bean or Starea blocks for 80 days. Weight changes were similar for cows on both protein supplements. As the trials progressed, consumption of Starea supplement declined; that of soya bean meal block remained constant. Cows fed Starea blocks had higher rebreeding rates than did those fed soya meal and their calves (when weaned) weighed more, though differences were not statistically significant.
Pregnant Hereford and Angus cows wintered on native bluestem pasture were used to compare soybeanmeal and Starea-containing blocks and protein supplements. Cow weight changes were similar with both supplements. Consumption of Starea supplement declined throughout the trial, while soybean meal block consumption remained constant.
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