QUESTIONS AND COLLATERAL READING 361 



of the hogs, there should be plenty of pasture. When corn 

 is the only grain feed, the pasture is also of value in fur- 

 nishing the mineral matter that the corn lacks. The 

 more succulent plants are better than the drier grasses. 

 Alfalfa is the most popular pasture for hogs. Alfalfa hay 

 is also fed in winter. 



311. Hog Diseases. Hog cholera is the most serious 

 obstacle in the way of hog-production. It is particularly 

 serious in the corn-belt. Entire herds of hogs are often 

 lost with it in a few weeks. Recent experiments have 

 shown that the disease may be prevented by vaccination. 1 



Tuberculosis is also a serious disease. It is often con- 

 tracted from infected milk. (For a discussion of the extent 

 of this disease and its prevention, see page 337.) 



United States Department of Agriculture Yearbook, 1908, pp. 34, 

 321-332. 



QUESTIONS 



1. What are the most numerous breeds of hogs in your county? 

 Which breeds are increasing in numbers? 



2. What are the common feeds for hogs in your community? 

 About how much of each is fed per day for each 1,000 pounds of live 

 weight? Find the nutritive ratio of this ration and compare with that 

 given in Appendix, Table 7. For the production of the lard type of hog, 

 the ration does not need to contain so much protein as the standard. 



3. What is the price of corn and of hogs? Find the comparative 

 price per pound of each. Will it pay better to feed the corn or to sell it? 



COLLATERAL READING 



Farmers' Bulletins Nos.: 



100. Hog-Raising in the South. 

 272. A Successful Hog and Seed Corn Farm. 

 133. Profitable Crops for Pigs, pp. 27-29. 

 296. Grinding Corn for Hogs, p. 25, 



