no ELEMENTARY AGRICULTURE 



Dividing weight of carbohydrates by that of protein (76 by 

 14.4) we get a ratio of about i to 5. "We have more protein 

 than we need. Let us try again with J/ bu. of peas instead. 



Feed. Protein. Carbohydrates. 



100 Ibs. hay contain 4.4 44 



30 Ibs. peas contain 5. 16 



130 Ibs. mixed contain 9.4 60 



Again dividing (60 by 9.4) we get 6.3, about right, and a much 

 cheaper feed. Now, how much of this ration shall we feed to a 

 dairy cow ? The table shows us that a cow needs about 2 Ibs. 

 protein daily, so this will be about enough for five days. One- 

 fifth of each feed will give us as a result 20 Ibs. of hay and 6 Ibs. 

 of peas for the daily ration. 



1 6. With the ration given in the illustration, how 

 long will a ton of hay last a cow ? 



17. How many bushels of ground peas will be re- 

 quired in the same time? 



1 8. What will it cost to feed the cow for this time 

 with hay at $7 per ton and peas at $i per bushel? 



19. Suppose she gives 25 pounds of milk daily on 

 this ration. With milk at $1.20 per cwt, what is 

 gained ? 



20. Make a ration of clover hay and corn in the 

 same way and figure its cost. 



21. Make a ration of oat straw, clover hay, and 

 ground peas. 



Experiment until you get about the right ratio, be- 

 ing careful not to use more grain than is necessary. 



22. Figure its cost at the current prices of feed. 



23. How long will your ration feed a work horse? 

 What is the cost of this feed for a horse for one day? 



