Department of Dairy Husbandry
There is a great variation in the producing ability of different cows. Testing eliminates the unprofitable cow and enables one to select the very best animals for breeding stock. Page 419.
There are six plans or systems for determining the production of each cow. All of these plans are feasible. It is very important that an accurate sample of milk be secured and that it be properly preserved until tested. Page 420-421.
Occasional farmers are keeping private records of the production of their cows. Page 422.
Boys' milk testing clubs have been organized for the purpose of testing individual cows. Page 422.
Creamery and cream station operators cooperate to the extent of testing samples from individual cows once a month. Page 422.
The cow testing association is an excellent means of determining production. Page 422-423.
Official and semi-official testing is used only in the case of purebred cows. This method is absolutely accurate and forms the basis for world's records. Page 423, 426.
The Babcock test for butterfat has become universal. Page 427.
The important steps in testing milk are sampling, measuring (17.6cc), adding acid (17.5cc), centrifuging, successive additions of hot water, tempering and reading. Pages· 427-430.
The important steps in testing cream are sampling, weighing, (9 or 18 grams), adding acid, adding water if necessary, centrifuging, tempering and reading. Page 430.
The testing of skim milk is similar to that of milk except that it calls for greater speed and length of time in centrifuging. Page 430-431.
Defective tests are caused by specific conditions which can be corrected. Page 431.
Cow testing eliminates the cow kept at a loss, raises the average production of the herd and increases the profits from dairying. Page 431.
dairy cows, dairy cattle, milk testing, dairy selection
South Dakota Experiment Station, South Dakota State College of Agriculture and Mechanic Arts
Jones, M.H. and Wright, T.H., "Milk Testing in Practice" (1922). Research Bulletins of the South Dakota Agricultural Experiment Station (1887-2011). 197.