June 1941] Agricultural Research in New Hampshire 33 



DAIRY HUSBANDRY 



A Study of Dry Feed Systems of Raising Dairy Calves (K. S. Mor- 

 row) 



This project has been set up to study the possibilities of weaning 

 dairy calves from whole milk at an early age and then depending 

 upon a dry calf starter and hay until the animals are six months old, 

 at which age they are normally put on a standard heifer ration. In 

 1939, the data collected on four Guernsey calves, weaned at an aver- 

 age age of 44 days, showed that the calves were above normal in 

 weight and height at six months of age. During 1940 four Jersey 

 calves, weaned at an average age of 61 days, were placed on a similar 

 ration to that used the previous year. While the Jerseys have not yet 

 reached six months of age, the results to date indicate that the calves 

 are approximately normal in weight and height. 



The rations used in this experiment consisted of the following 

 mixture : 400 pounds ground yellow corn, 300 pounds wheat bran, 

 200 pounds ground oats, 100 pounds linseed oilmeal, 100 pounds cot- 

 tonseed meal, 12 pounds steamed bone meal, 12 pounds salt, .25 per 

 cent (3.7 lbs.) cod-liver oil concentrate, and 25 per cent skim-milk 

 powder. Mixed clover and timothy hay supplemented the dry calf 

 starter. 



(Bankhead-J ones Fund) 



A Study of the Relation of the Conformation and Anatomy of the 

 Dairy Cow to Her Milk and Butterfat Producing Capacity 



(K. S. Morrow) 



Ante- and post-mortem data have been received on three cows 

 during the year, making a total of sixteen cows which have been 

 slaughtered in connection with this project. The information on 

 these animals has been tabulated and forwarded to Washington, D. 

 C, for inclusion with similar data from other cooperating stations. 



No attempt has been made to analyze individual differences in 

 the data, although interesting anatomical variations are observed as 

 the data accumulate. 



(Bankhead-J ones Offset Fund) 



Variability in Milk Solids-Not-Fat (H. C. Moore and K. S. Morrow) 



Using the method approved by the United States Department of 

 Agriculture in proving bulls for milk production, the results of work 

 on this project indicate that the three factors — milk production, but- 

 terfat content, and percentage solids-not-fat- — may be inherited separ- 

 ately. A given sire may produce significant changes in one of these 

 factors without any correlated effect on the others. 



The tabulation below shows the degree of variation in the three 

 factors for daughters of particular sires as compared with the dams 

 of these same daughters. 



