148 Pork Production 



rations were fed in the dry lot. The amount of pork 

 accredited each acre of forage here was almost exactly 

 double that shown in Table XXXIII. The difference 

 in the saving of grain effected was even greater. When 

 corn alone was fed, an acre of forage saved 3738 pounds 

 of grain, while when corn and a nitrogenous supplement 

 were given, an acre of forage saved 1102 pounds of feed. 

 The pigs in these experiments, like those in the previous 

 tests, were of spring farrow and full fed during the periods 

 of the tests. 



That the usual forage crops supply considerable quan- 

 tities of food materials which are lacking in corn is also 

 shown by the summarized results in Table XXXVI. The 

 pigs obtaining forage in these experiments gained more 

 than twice as fast as did those receiving corn alone in the 

 dry lot, and the amount of corn fed for each 100 pounds' 

 gain was practically one-half. Although most forage 

 crops do not supply sufficient protein to balance straight 

 corn for pigs, they do furnish sufficient materially to 

 reduce the proportion of purchased supplements neces- 

 sary for productive rations. 



Summary of benefits from growing forage crops. 



Considering the teachings of practical experience as 

 well as the results of experimental studies, the following 

 advantages for forage crops may be enumerated : 



1 . Pigs on forage make more rapid gains than do those 

 confined to the dry lot, other conditions being the same. 

 It has also been observed that forage-fed pigs are capable 

 of sustaining a rapid rate of gain for a longer period of 

 time. With balanced rations and full feeding, the average 

 rate of gain, as shown by the experimental results in Table 

 XXXIII, was increased 37 per cent. With corn alone and 



