Agricultural Extension Service, South Dakota State College
Dairy cows, in order to make milk in large quantities, must be supplied with liberal amounts of the raw material from which milk can be made. That means good feed.The average production of South Dakota milk cows for 1961 was 5,700 pounds of milk and 205 pounds of butterfat. Much of this relatively low production is due to poor feed and lack of enough feed. Production and feed records shown in table 5 reveal that one way to get increased production is to give the cows more feed. Feed is the greatest single item of expense in producing milk. It accounts for about half the total yearly cost of keeping a cow. Since feed is such an important part of the expense in producing milk, the herd owner probably has the greatest opportunity to reduce his production costs and increase his net ·profit by studying how he can supply his cows with the food nutrients they need at the lowest cost.
Kurtz, Ervin, "Feeding the Dairy Herd" (1961). SDSU Extension Circulars. 601.