148 DESCRIPTION OF FEEDING STUFFS 
Plant Industry, Bulletin 124, 1908. “ Experiments on the Digestibility of 
Prickly Pear by Cattle,” Hare, U. 8. 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, U. S. Farmers’ Bulletin 483, 1913. “ Behavior under Cultural 
Conditions of Species of Cacti Known ag Opuntia,” Griffiths, U. 8. Depart- 
ment of Agriculture Bulletin 31, 1913. 
QUESTIONS 
. What root crops are commonly used for stock feeding in this country? 
. Give the characteristic points in favor of the six most important root 
crops. 
x What is the relative value of roots and silage to the stock farmer? 
. Name the farm animals to which potatoes may be fed, and method of 
feeding these. 
. Describe, briefly the value for feeding farm stock the following crops: 
Cabbage, rape, pumpkins, and sweet potatoes. 
. What is the general value of fruits for feeding farm stock? 
. Name some of the main range and desert plants and discuss briefly their 
value for stock feeding. 
TO an Be OO Noe 
