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PART VII. EXPERIMENTS WITH DAIRY CATTLE. 



LINES OF EXPERIMENTATION. 



At the Central Experimental Farm at Ottawa several lines of 

 experiments with dairy cattle have been conducted during the past 

 twenty years, the chief being: 



(1) Experiment to determine the number of dairy cattle that 

 might be carried to the acre of arable land on the average Canadian 

 farm. 



(2) Breeding. 



(3) Influence of hours of milking on quantity and quality of 

 milk. 



(4) Cost of feeding and economy of production of milk. Experi- 

 ments with various feeds, both roughage and concentrates, to deter- 

 mine their values as feeds for dairy cows. Feeding methods. 



(5) Ventilation. 



(6) Individual records. 



SUMMARY OF THE WORK DONE ON A FORTY-ACRE LOT AT THE CENTRAL 

 EXPERIMENTAL FARM, 1891-1894. 



Dr. J. W. Robertson in 1891, while he was Agriculturist at the 

 Central Experimental Farm, began experiments on a forty-acre lot 

 with the object of ' directing the attention of farmers to the practi- 

 cability of keeping cattle in larger numbers than had been their 

 custom on the moderate and small-sized farms of Canada ' and in 

 order to illustrate how many cattle might be fed each year on the 

 products of that area. 



