16 BULLETIN 637, U. S. DEPARTMENT OP AGRICULTURE. 



under the conditions named, a ton of barley is worth $24.64 + $7.30 = 

 $31.94. In a like manner the value of a ton of oats and rye are ob- 

 tained : 



Oats: 998X0. 0204 =$20. 36 

 7.86 



28. 22 (Value of a ton of oats.) 

 Rye: 1202X0.0204= 24.52 

 8.02 



32. 54 (Value of a ton of rye.) 



The value of each of these grains per bushel is now easily found from 

 Table III to be as follows: Barley, 77 cents; oats, 45 cents; rye, 91 



HOW TO USE TABLE V. 



Given a certain number of carbohydrate feeds with the local selling 

 prices per ton, to determine the relative cost of excess carbohydrate 

 per pound, proceed as follows : 



(1) In columns headed "Value of cottonseed meal" select the one 

 corresponding most nearly to the local market price of that feed. 



(2) In that column take the amount found opposite the name of the 

 feed in question and subtract it from the local selling price of that feed. ] 

 The difference represents the cost of the excess carbohydrate. 



(3) In the last column opposite the name of the feed is given the 

 amount of excess carbohydrate in a ton. Divide the value obtained 

 above by 'this amount and the result is the cost of a pound of excess i 

 carbohydrate when bought in the feed considered. 



In many sections of the West and Southwest alfalfa hay is the basic 

 feeding stuff. It is distinctly nitrogenous in character, and it is often 

 desirable to buy carbonaceous feeding stuffs to balance the ration. 

 The method of procedure is the same as that already given in con- 

 nection with Table V. 



As seen in Table VI, a ton of alfalfa hay contains 212 pounds * of 

 digestible protein and 820 pounds 1 of digestible carbohydrates, or 

 3.868 pounds of carbohydrates for each pound of protein. Hereafter in 

 the discussion of this table this 3.868 pounds of carbohydrates to each 

 pound of protein is referred to as "proportional carbohydrates." It is 

 the proportion of carbohydrates accompanying protein in alfalfa hay. 



A ton of barley contains 180 pounds of protein, and 1408 pounds 

 of carbohydrates. Now, in alfalfa hay, 180 pounds of protein would 

 be accompanied by 696 pounds of carbohydrates (180x3.868 = 696). 

 The nutrients in a ton of barley may thus be classified as follows: 



Pounds, j 



Protein 180 pounds, proportional carbohydrates * 696 



excess carbohydrates ' 712 



Total carbohydrates 1 1, 408 



1 See Table VI, last four columns opposite names of feeds in question, for the distribution of the nutrients 

 in a ton of each. 



