By 1952 all the major soybean crushers (except A.E. Staley Mfg. Co.) were vertically integrated, manufacturing their own mixed feeds or edible oil products or both. Major manufacturers at that time included Allied Mills, ADM, Borden Co., Cargill, Central Soya, General Mills, Glidden, Iowa Milling Co., Pillsbury Mills, Procter & Gamble, Ralston ...