Substitution of Roots for Concentrated Foods. 491 



(4) The lowest price at which a pound of butter fat was produced 

 was 20.7 cents, with ration I (hay, grain, and silage). 



(5) The cost of one pound of butter fat with ration II (hay, grain, 

 and mangels) was 27.4 cents. This was considered too high to be eco- 

 nomical. 



(6) The cost of one pound of fat with ration III (hay, grain, mangels, 

 and silage, grain ration reduced one-half by substituting mangels) was 

 20.7 5 cents. Since the cost of one pound of fat in the check group averaged 

 for the two years 20.6 cents, ration III was considered economical. 



(7) One pound of dry matter in mangels is a little more than equal 

 to one pound of dry matter in silage. 



(8) One pound of dry matter in mangels is equal to one pound of dry 

 matter in grain, and mangels may replace one-half the ordinary grain 

 ration with mixed hay and silage. 



(9) Accepting the average price of commercial feeding-stuffs at 

 $30 per ton, and considering one pound of dry matter in mangels equal 

 to one pound of dry matter in grain, mangels may be used economically 

 in the ration to replace one-half the grain ordinarily fed when they 

 can be produced and stored ready for feeding at $4 per ton. In arriv- 

 ing at this conclusion, the average amount of dry matter in grain is 

 considered to be 90% and in mangels to be 12%. 



(10) It would seem to be a safe assumption that farmers can raise 

 mangels for $4 per ton and thus reduce their feed bill very materially 

 by the judicious use of mangels to replace one-half of the grain ordinarily 

 fed in the ration. 



