PRODUCING MARKET MILK IN NORTHWESTERN INDIANA. O 



which averaged 6,987 pounds of milk testing 3.6 per cent butterfat. 

 Grade cows made up 78 per cent of those included in the 2-year 

 study and the rest were purebred. Complete records for 2 consecu- 

 tive years were obtained on 12 of the herds whose owners cooperated 

 throughout both years. The number of cows in the herds is obtained 

 by adding the cows in each herd each month and dividing the total 

 by 12. 



Table 1. — Number of cows in herds, average yearly production of milk, and calves pro- 

 duced each year. 





1915-16. 



1916-17. 



Herd No. 



Cows in 

 herd. 



Calves 

 produced 

 per year. 



Production 

 per cow 

 per year. 



Cows in 

 herd. 



Calves 

 produced 

 per year. 



Production 

 per cow 



per year. 



102 



Number. 

 13.6 

 23.2 

 27.5 

 25.8 

 16.1 

 28.4 

 18.9 

 11.5 

 18.4 

 28.9 

 16.5 



9.8 

 14.4 



7.8 



Number. 

 13 

 20 

 20 

 17 

 13 

 23 

 14 

 13 

 17 

 25 

 12 



8 

 15 



6 



Pounds. 

 6, 139. 9 

 6,957.4 

 6,562.6 

 7,091.0 

 6,331.4 

 6,309.8 

 7,622.5 

 6,710.0 

 9, 063. 

 4,915.0 

 0, 296. 9 

 6,710.8 

 9, 127. 

 9,452.6 



Number. 



Number. 



Pounds. 



103 -- 



20.5 



20 



6, 237. 



104 





106 



28.0 

 18.7 

 29.8 

 19.4 

 11.2 

 13.7 



26 

 21 

 30 

 17 

 9 

 13 



6, 890. 8 



107 



6, 162. 3 



108 



5,660.6 



109 



7, 866. 2 



110 : : 



5, 778. 1 



Ill 



9,083.4 



112 





113 - - 



15.0 



9.8 

 15.2 



9.4 

 18.2 



13 

 10 

 11 

 8 

 13 



5, 566. 7 



114 . 



7,007.6 



115 . 



7,538.3 



116 - 



9,127.5 



117 



6, 454. 6 



118 



37.5 

 35.2 



32 



18 



6,455.2 

 7, 306. 6 





119 



31.8 

 17.8 

 13.8 

 17.3 

 24.8 

 22.5 

 27.6 

 15.6 

 23.9 



33 

 13 

 16 

 17 

 22 

 19 

 27 

 17 

 24 



7, 750. 8 



121 . 



7, 166. 3 



122 . 









6, 682. 8 



123 









7, 933. 8 



124 









8, 156. 2 



125 









9, 106. 



126 









6, 947. 



127 









4, 779. 4 



128 









5, 465. 4 













Total 



333.5 



266 





404.0 



379 













20.8 



16.6 



6, 877. 



19.2 



18.0 



6, 987. 







According to these figures 87 per cent of the cows produced a 

 living calf each year. 



Table 2. — Per cent of cows dry during the winter, summer, and year. 



Period. 



First year. . . 

 Second year . 



Winter. 



Per cent. 

 12.6 

 13.2 



Summer. 



Per cent. 

 12.1 

 12.7 



Year. 



Per cent. 

 12.4 

 13.0 



There was only a slight variation in the percentage of dry cows 

 in the two seasons. This accounts for the uniformity of production 

 of milk for the seasons. The calf crop was divided equally between 

 seasons. 



