utilization of the Sweet Potato 



33 



Table X. — Comparative Analysis of Sweet Potato Vines. 



The plants with which the potato vines are compared 

 in the above table are among our most nutritious hays 

 and attention is called to the fact that they are all 

 legumes. Although the average protein-content is about 

 4 per cent greater than that contained in the potato 

 vines, the percentage of both fat and nitrogen free ex- 

 tract is decidedly in favor of the latter. It will also 

 be noticed that the fiber-content is relatively high in 

 all of these hays compared, which is of course the least 

 valuable of any food constituent. 



Although analysis shows a very favorable comparison, 

 the actual value as a hay in practical feeding is yet to 

 be demonstrated by determining the real digestibility 

 and power of utilization by animals of the food con- 

 stituents. 



Unless cheap labor is available and the cost of har- 

 vesting thereby reduced, it will often be more profitable 

 to leave the vines on the ground to decay and supply 

 organic matter than to undertake their manufacture 

 into hay. 



MANTJFACTUKED PEODUCTS OF THE SWEET POTATO 



The manufacture of sweet potatoes into various food 

 forms which can be more systematically handled in 



