CALCULATING ECONOMICAL BALANCED RATION'S. 5 



The excess or deficiency in protein of each feeding stuff in the above 

 example is found first for one pound, in Table I or II, in the column 

 headed "Ratio 1 to 6." The figures given in the table are then 

 multiplied by the number of pounds of the respective feeding stuffs 

 in the ration. Thus, in a ration with a 1 : 6 ratio, a pound of corn 

 silage is deficient in protein to the extent of 0.0167 pound. (See 

 Table II, column headed "Ratio 1 to 6," line beginning "Corn silage, 

 well matured.") There being 30 pounds of silage, the total protein 

 deficiency in silage is 0.0167X30 = 0.5010 pound. Subtracting the 

 excess protein in 10 pounds of alfalfa (0.376 pound), the net deficit 

 of protein is found to be 0.3026 pound. Dividing this by the excess 

 protein in one pound of cottonseed meal, which is 0.3013 pound, we 

 find that it takes almost 1 pound of the latter to balance the ration 

 to a 1 to 6 ratio. After adding this pound of cottonseed meal, the 

 balanced ration stands as follows : 



Protein. 



Excess. 



Deficiency. 



30 pounds corn silage 



10 pounds alfalfa hay 



3 pounds corn meal 



1 pound cottonseed meal . 



0. 3760 

 ".30i3 



0. 5010 

 ' '.'1776 



Sometimes it may be desirable to balance a ration, not simply by 

 adding a protein feeding stuff, but by substituting it for one less rich 

 in protein. Suppose, for instance, that we desire to substitute 

 enough cottonseed meal for corn meal in the above ration to make the 

 nutritive ratio 1 to 6. In this case the ration is worked out as follows • 



Protein. 



Excess. 



Deficiency. 



30 pounds corn silage. 

 10 pounds aLfalia hay. 

 3 pounds corn meal. . 



. 0. 3760 



0. 5010 

 ".1776 



.3760 



.6786 

 .3760 



Net deficiency. 



.3026 



Taking out 1 pound corn meal reduces deficiency 



Adding 1 pound cottonseed meal reduces deficiency. 



Total reduction per pound substituted 



Pounds to be substituted, 0. 3026^-0. 3605=0.84. 



Corn meal remaining after substitution, 3.00—0.84=2.16. 



0. 0592 

 .3013 



.3605 



