cow testing, animal husbandry department, dairy, farm management
Cooperative Extension Service, South Dakota State College of Agriculture and Mechanic Arts
The average cow kept for dairy purposes in South Dakota produces scarcely 3300 pounds of milk in a year. Her yearly butterfat production is .estimated to be in the neighborhood of 125 to 130 pounds. Information as to the amount of profit such cows bring their owners has been obtained since 1923 during four years of organized testing in the eastern part of the state. These records show that a cow which gives about 3300 pounds of milk or 125 pounds of butterfat in a year produces an income over feed cost of approximately $25. - Quite a number of the best herds in the state have consistently made an income over feed cost of $100 per cow.
Heebink, G., "Cow Testing Pays" (1928). SDSU Extension Circulars. 271.