Studies on the Nature of the Effective Supplements for Soybean Oil Meal in Rations for the Production of Hatching Eggs ,

SEVERAL reports have been made on the value of soybean oil meal as a protein supplement for the production of hatching eggs. These have shown that when the meal alone is used poor hatchability is experienced. Hayward, Halpin, Holmes, Bohstedt, and Hart (1937) reported that soybean oil meal as the sole protein supplement to grain rations fed to hens was unsatisfactory for the production of hatching eggs. They also found that the hatchability of eggs was improved when small amounts of dried milk and meat scraps were included in the rations. Byerly, Titus, Ellis, and Nestler (1937) likewise found the meal to be a poor supplement, and found that the addition of a relatively large amount of meat scraps improved hatchability. They also reported a seasonal fall in hatchability which was more serious during the months of January and February. These reports, then, indicated that soybean oil meal as a . . .