Fattening Pigs in the Dry Lot 



259 



As calculated from the averaged quantity of corn and 

 supplement required to produce a unit of gain in these 

 eight experiments, tankage and linseed-oil meal would have 

 the following relative money values : 



TABLE CUT. VALUE OF TANKAGE AS AFFECTED BY THE 

 PRICE OF CORN AND LINSEED-OIL MEAL 



Tankage versus wheat shorts or middlings. 



The problem of choosing between wheat shorts or 

 middlings and tankage, in obtaining the supply of pro- 

 tein with which to balance corn for fattening pigs in the 

 dry lot, is one demanding annual consideration. To 

 give information regarding the relative efficiency of 

 these two supplements, the results of six practical feeding 

 tests are summarized in Table CIV. These experi- 

 ments covered an average period of 74 days, and the 

 pigs were generally fed to finished market weights. 



These results show that a balanced ration of corn and 

 tankage was more palatable than one of corn and shorts 

 or middlings. This was true in every experiment but 

 one. The pigs fed tankage made average daily gains of 

 J pound in excess of those given shorts or middlings. 

 The reliability of these results, however, is affected, no 

 doubt, by the extreme variation of the proportions in 

 which the shorts or middlings were fed in the different 

 experiments. Usually it is necessary to feed 1 part of 



