148 DESCRIPTION OF FEEDING STUFFS 



prickly pears and 4.3 pounds of cottonseed meal per head daily for 

 a period of 104 days gained 1.75 pounds daily per head on this feed ; 

 it required, therefore, 55 pounds of pears and 2.5 pounds of cotton- 

 seed meal per pound of gain^ at a cost of about Si/o cents per day 

 for feed. 



References. The following Department of Agriculture or experiment 

 station publications have been issued during late years on the subject of 

 prickly pears and spineless cacti : " Singed Cacti as a Forage," Arizona 

 Bulletin 51 (Timely Hints No. 52), May, 1904. "The Prickly Pear and 

 Other Cacti as Feeds for Stock," Griffiths, U. S. Bureau of Plant Industry. 

 Bulletin 74, 1905. "Feeding Prickly Pear to Stock in Texas," Griffiths. 

 U. S. Bureau of Animal Industry, Bulletin 91, 1906. " Prickly Pear and 

 Other Cacti as Food for Stock," Griffiths and Hare, New Mexico station, 

 Bulletin 60, 1906. "Cacti in New Mexico," N. M. Bulletin 78. "The 

 Prickly Pear as a Farm Crop," Griffiths, Bureau of Plant Industry, Bulletin 

 124, 1908. " Experiments on the Digestibility of Prickly Pear by Cattle," 

 Hare, U. S. Bureau of Animal Industry, Bulletin 106, 1908. " Spineless 

 Prickly Pears," Griffiths, Bureau of Plant Industry, Bulletin 140, 1909. 

 " Native Cacti as Emergency Forage Plants," Thornber and Vinson, Arizona 

 Bulletin 67, 1911. "The Thornless Prickly Pears," Griffiths, Farmers' 

 Bulletin 483, 1913. " Behavior under Cultural Conditions of Species of 

 Cacti Known as Opuntia," Griffiths, U. S. Department of Agriculture 

 Bulletin 31, 1913, and Bulletin 208, "Yields of Native Prickly Pear in 

 So. Texas," 1915. "Prickly Pears as a Food for Dairy Cows," Jr. Agr. 

 Research 4, p. 405. 



QUESTIONS 



1. What root crops are commonly used for stock feeding in this country? 



2. Give the characteristic points in favor of the six most important root 



crops. 



3. What is the relative value of roots and silage to the stock farmer? 



4. Name the farm animals to which potatoes may be fed, and method of 



feeding these. 



5. Describe briefly the. value for feeding farm stock the following crops : 



Cabbage, rape, pumpkins, and sweet potatoes. 



6. What is the general value of fruits for feeding farm stock? 



7. Name some of the main range and desert plants and discuss briefly their 



value for stock feeding. 



