KELATION" OF PRODUCTION TO INCOME FROM COWS. 



13 



records of many cow-testing associations was made, and is shown in 

 Table 5. For comparative figures from individual cow records see 

 Table 2. 



The herd records were sorted according to average production of 

 butterfat per herd, and the income over cost of feed was determined, 

 us usual, by finding the weighted averages of the individual cow 



Table 5. — Relation of butterfat production to income over cost of feed as shown 

 by a tabulation, of the herd records of 1,309 herds where the product was sold 

 as butterfat; years 1910 to 1920. inclusive. 



Group No. 



Number 



of 

 herds. 



Number 



of 



cows. 



Butterfat pro- 

 duction. 



Average 



income 



over 





Range. 



Average. 



cost of 

 feed. 



1 „ 



2 



112 



333 



464 



270 



97 



24 



5 



1 



1 



22 



1,556 



4,496 



6,724 



3,443 



1,171 



270 



46 



6 



7 



Pounds. 

 76-125 

 126-175 

 176-225 

 226-275 

 276-325 

 326-375 

 376-425 

 426-475 

 476-525 

 526-575 



Pound?. 

 119 

 161 

 205 

 251 

 297 

 344 

 391 

 451 

 496 

 526 



$25. 35 



2 



30 56 



3 



41.23 



4 



54.00 



5 



64.49 



6 



81. 17 



7 



93. 46 



8 



89.42 



9 



99.40 



10 



45.09 







Total 



1,309 



17, 741 













248 



52. 84 











records in each group. As there was no reason to believe that the 

 tabulation of more records would materially affect final conclusions 

 it seemed useless to carry this tabulation farther, though the number 

 of records used in Table 5 was somewhat less than the number used 

 in some of the other tables. 



The increase in income over cost of feed as production increased 

 i- not quite so marked in Table 5 as in Table 2, because in the former 

 the records were grouped according to herd averages regardless of 

 individual production. Even with that handicap the high-produc- 

 ing herds always showed an increased income over feed cost as 

 production increased from group to group. The average income 

 over cost of feed per cow for the 24 herds in Group 7 was more than 

 three times as great as \'<>i' the I L2 herds in Group 2. 



CONCLUSIONS ALWAYS THE SAME. 



ilatione were made, by breeds, of thousands of records of 

 grade and purebred cows to determine the relation of butterfat pro- 

 duction to income over cost of feed. In every case the results were 

 \<tv similar to those already given. Tabulations for each age of 

 !, breed also gave nmilai results, and the results weir aboul the 

 hen the records for each association or \'<>r any agricultural 

 district were tabulated. // seems I"'"', therefore^ to conclude that 



