376 FEEDS AND FEEDING, ABRIDGED 



tening pig has not this capacity for roughage, and hence will not con- 

 sume enough hay to balance his ration sufficiently to produce maxi- 

 mum gains. For example, in trials at the Kansas Station 18 pigs fed 

 a ration of 6.6 lbs. of corn and 0.9 lb. tankage gained 1.58 lbs. per 

 head daily, while others fed 6.5 lbs. corn and 1.2 lbs. alfalfa hay in a 

 rack gained only 1.13 lbs. With corn at $19, alfalfa hay at $8, and 

 tankage at $41 to $45 per ton, the pigs fed tankage made cheaper, 

 gains than those fed alfalfa hay. 



On the other hand, with corn and barley at $20, tankage at $40, and 

 alfalfa hay at $5 per ton, the Colorado Station 10 found alfalfa a much 

 more economical supplement than tankage. Whether to use alfalfa 

 hay or purchased concentrates to balance the ration of fattening pigs 

 will therefore depend on the relative price of these feeds. Alfalfa 

 hay is most efficient as a supplement in fine winter weather when the 

 pigs have good appetites for the hay and corn. In unfavorable 

 weather or when the pigs are out of condition the use of some nitroge- 

 nous concentrate, like tankage, linseed meal, or shorts, aids in stimu- 

 lating the appetite and hence results in larger gains. 



QUESTIONS 



1. Give the results of feeding trials in which corn has been fed alone and 

 with a supplement to pigs. 



2. Discuss the hogging down of corn. 



3. What is the value for pigs of wheat, rye, oats, emmer, the grain sorghums, 

 millet, hominy feed? 



4. What is the best supplement to corn from the standpoint of gains pro- 

 duced ? 



5. How much skim milk would you feed per pound of corn to pigs of various 

 weights ? 



6. What is the value of buttermilk and whey for pigs? 



7. How much tankage is needed to balance the ration of corn-fed pigs? 



8. Discuss the value for pigs of the other protein-rich concentrates fed to 

 swine in your locality. 



9. Name 9 essentials of a good forage crop for pigs. 



10. What are the best forage crops for swine in your locality, and why are 

 they the best? 



11. Discuss the value of roots and of silage for swine. 



12. How may legume hay be used in swine feefling? 



is Waters and Kinzer, Kan. Bui. 192. 

 io Morton, Colo. Bui. 188. 



