Feed Processing. VI. Comparison of Starea, Urea, and Soybean Meal as Protein Sources for Lactating Dairy Cows

l~ilk production, grain intake, body weight change, and the production and concentration of milk constituents were criteria to evaluate Starea (an intimate mixture of gelatinized starch and urea) as a protein supplement for lactating dairy cows.Cows fed grain rations supplemented with either soybean meal or Starea (23% crude protein) consumed more grain and produced more milk containing more protein than cows fed the same grain ration supplemented with urea.Starea was approximately equal to soybean meal as a protein supplement for lactating cows.