SWINE GROWERS' SESSION. 



Tuesday, January 7, 1908. 



A RESUME OF THE EXPERIMENTAL WORK WITH HOGS 

 DONE AT THE IOWA EXPERIMENT STATION. 



(Prof. Wayne Dinsniore, Iowa Agricultural College.) 



This subject is so broad that I have decided to confine myself 

 chiefly to the more recent work completed at the Iowa Station. 

 The experiments to which I wish to give most attention have been 

 coducted within the past six years. The principal objects sought 

 in these investigations have been : 



"1. To compare with each other and with a ration of corn 

 alone, rations made up of corn with certain supplementary feeds 

 richer in protein. Barley, wheat shorts, meat meal and tankage 

 were the supplements used." 



2. "To compare rations composed of corn and varying pro- 

 portions of these supplemental feeds." 



3. "To compare dry lot and pasture feeding of hogs." 



4. "To compare timothy and clover pasture." 



The preliminary experiment was conducted in 1902, and while 

 by no means an extensive one, gave evidence which indicated that 

 the supplemental foods increased the rate of grain, and were well 

 worth their cost. No difference of note was discernible in the ap- 

 pearance of the finished hogs and all sold for the same price on 

 the market. 



This preliminary experiment aroused great interest, and as 

 the results could by no means be considered conclusive, more com- 

 plete tests were determined upon. These were conducted during 

 1905 and 1906, and are reported in Bulletin 91. Altogether, 18 

 lots were used, including a total of 184 pigs, varying in weight 

 from 31 to 291 pounds at the beginning of the tests. Twelve of 

 these lots were fed in dry yards and six on pasture. Four lots 

 were fed in midsummer, four in spring, and ten during the late 

 summer and fall. 



It is manifestly impracticable to go into any considerable de- 

 tail in this review, and I shall therefore consider only the general 

 results obtained. 



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