272 CONTENTS 



Results of the investigation (concluded] : 

 Part II (concluded) : 



Production per cow ' 3^5 



Intensity of feeding ... 3 8 9 



Relation of production to diminishing returns 390 



Relation of production and season of production to intensity of feeding and 



to costs and returns 393 



Relation of production to value of cows . 395 



Combined effect of size of herd, season of production, and production per cow, 



on costs and returns 396 



Butterfat test of milk 397 



Variation in test 398 



Relation of test of milk to production 399 



Relation of test of milk to costs and returns 399 



Comparison of hill and valley farms 400 



Location 400 



Size of dairy business 401 



Season of production 402 



Production 402 



Cow-testing-association herds 404 



Milk hauling 407 



Part III. Concerning heifers .' 411 



Amounts of feed used and labor required 411 



Feed 411 



Labor 412 



Costs, returns, and profits 413 



Size of herd 414 



Heifers in three seasonal groups 414 



Production per cow, and costs and returns for heifers 416 



Probable cost at 1920 prices 419 



Results for first and second years from other sources 422 



Part IV. Concerning herd bulls 423 



Bull calves to be kept . 423 



Herd bulls from one to two years old 423 



Herd bulls more than two years old 423 



Feed used 424 



Labor 425 



Cost of keeping herd bulls 426 



Cost of bull service on farms keeping herd bulls 427 



Cost of bull service on farms hiring service only 427 



Total cost of bull service 427 



Comparison of grade and purebred bulls " 427 



Age of bull 427 



Cost of bulls in three seasonal groups 43 1 



Part V. Concerning veals and bulls to be sold 434 



Amount and value of feed used, and miscellaneous costs and returns 434 



Size of herd and number of calves vealed 435 



Calves vealed in three seasonal groups 436 



Summary 438 



Blank form used 440 



