CHAPTER IV. 

 RELATION OF BREED TO ECONOMY OF PRODUCTION. 



Probably the most extensive tests with breeds of swine 

 have been conducted by the Ontario Agricultural College and 

 the Iowa State Experiment Station. At the Ontario Agricul- 

 tural College five tests were conducted in which six breeds of 

 svdne were compared as to the amount of feed required for 

 100 pounds gain live weight. At the Iowa Experin? -nt Station 

 tbree tests were made in which the same six breeds were com- 

 pared as to the amount of feed required for 100 pounds gain 

 live weight. The results of these two series of tests are, there- 

 fore, of considerable importance. In the Ontario tests, only 

 the meal is considered in four of the tests, such feeds as dairy 

 by-products and green feed, which were the same for all breeds, 

 being omitted. In one test the results are given in terms of 

 dry matter. 



Ontario Feeding Trials. — Following are the results of the 



Ontario tests: 



Meal Consumed Pee 100 Pounds Gain in Weight. 

 1st Test. 



Pounds. Pounds. 



Berkshire 398 Duroc-Jersey 424 



Tamworth 400 Chester White 452 



Poland-China 417 Yorkshire 468 



2d Test. 

 Pounds. Pounds. 



Berkshire 327 Chester White 340 



Tamworth 331 Yorkshire 341 



Poland-China 333 Duroc-Jersey 358 



(41) 



