DAIRY FARMING DAIRYING. 



671 



" From this table it is seen that during the winter of 1894-1895, with a daily 

 protein supply of 2 lbs. and a nutritive ratio of 1 : 6.8, there was obtained a 

 greater yield of milk fat than during any winter following until the winters 

 of 1907-190S and 1008-1909. The period covered by the data was 151 days, 

 and the members of the herd maintained their body weight. During the winter 

 of 1895-1890 the daily average protein supply was 2.59 lbs. and a nutritive 

 ratio of 1 : 5.3, with a depression in the yield of milk fat and solids-not-fat, 

 and an increase in the weight of the cows." 



From 1902-1905, the herd was divided into two groups, one receiving a low 

 protein and the other a high protein allowance. The milk-fat yield of the 

 low-protein group for all three years was uniformly the lower. 



The following table " was arranged by eliminating the data for the three 

 groups with low-protein rations, and converting the average nutrients con- 

 sumed per day each winter to nutriment. This was done by multiplying the 

 ether extract in the rations by 2.2, adding the prc^rct to the carbohydrates 

 and protein in the rations, multiplying the butter-fat yielded daily by 2.25, 

 adding the solids-not-fat to obtain the total product, and calculating the nutri- 

 ment used for body maintenance, the net nutriment per unit of product, and the 

 weights of the herd." 



Summary of average live tceight. nuiriment daily, total for maintenance, for 

 product, and in product yielded, and net nutriment per pound of product. 



" The exceptional amount of nutriment charged to a pound of product, 1.99, 

 during the winter of 1895-1896 was due to the fact that part was diverted to 

 gain in weight at the rate of 0.2 lb. per day during period II. The excep- 

 tionally small amount used during the winter of 1903-1904 is due, at least in 

 part, to the fact that more roots were fed than during any other winter, and 

 possibly to light feeding and a narrower nutritive ratio. The large yield. 

 4.576 lbs. for the winter of 1902-1903, was due to the fact that it covered a 

 period of only 97 days." 



It is stated that heavy feeding, as a rule, causes more waste than light feed- 

 ing. It appears that during the last four winters more net nutriment was con- 

 sumed to a pound of product yielded. A study of the relation of the feed to 

 the size of the cows " shows that the average amount per day of nutriment 

 consumed per 1,000 lbs. live weight ranged from 15.15 to 18.44 lbs., and averaged 

 for the eight winters 17.03 lbs. After deducting the amount calculated for 

 64822'— No. 7—14 6 



