268 



Pork Production 



middlings. The pigs eating the former ration made a 

 daily gain of more than J pound in excess of that gained 

 by the pigs fed the middlings. 



Another important advantage of linseed-oil meal 

 over shorts or middlings was that a larger proportion of 

 the ration was corn. In order to supply as much protein 

 as was contained in the ration of 5 parts corn and 1 part 

 of linseed-oil meal, it would be necessary to feed 1 pound 

 of shorts or middlings with each pound of corn. 



A smaller amount of total feed was consumed in the 

 production of a given gain, also, with the linseed-oil meal 

 ration than with the ration containing middlings. Based 

 on the feed required to produce 100 pounds of gain, as 

 given in the summary table, linseed-oil meal would have 

 the valuations shown in Table CXIII. 



TABLE CXIII. VALUE OF LINSEED-OIL MEAL AS AFFECTED 

 BY THE PRICE OF CORN AND WHEAT SHORTS OR MIDDLINGS 



If the addition of shorts or middlings to a ration of 

 corn and tankage has the effect of improving its value 

 and efficiency, there is reason to believe that a combina- 

 tion of corn, shorts or middlings, and linseed-oil meal 

 would be an improvement over corn and linseed-oil meal 

 alone, although there is no evidence except general expe- 

 rience to support it. A ration of 8 parts of corn, 2 parts 

 shorts or middlings, and 1 part linseed-oil meal, by weight, 



