58 



FARM ARITHMETIC. 



those that furnish nutrients at least cost and at the same 

 time contain the highest quantity of protein. 



122. When timothy hay is worth $20 per ton on basi$ 

 of total digestible nutrients, what is cowpea hay worth? 



123. Clover hay? 



124. Alfalfa hay? 



125. Corn stover? 



126. When timothy hay sells for $20 per ton and 

 clover hay for $10, how much more costly is a pound of 

 nutrients in timothy hay than in clover hay? 



127. How many dollars would represent the commer- 

 cial difference if 100 tons were purchased? 



Important truth. Consider the protein content in the 

 sale or purchase of hays just as carefully as you would 

 do with the concentrates. At the same price per ton. 

 cowpea hay and alfalfa hay are to be preferred to tim- 

 othy because of the greater amount of protein and total 

 digestible nutrients contained. It is wise farming not 

 only to grow all hay and roughage material for feed, 

 but also to select for growing those that are rich in pro- 

 tein — the most costly and most important nutrient. 



