CALCULATING ECONOMICAL BALANCED RATIONS. 11 
As seen in Table IV, a ton of corn contains 1,538 pounds of carbo- 
hydrates and 138 pounds of protein, or 0.0897 pounds of protein for 
each pound of carbohydrates. Hereafter, in the discussion of this 
table, this 0.0897 pound of protein to each pound of carbohydrates 
is referred to as ‘‘proportional protein.’’ It is the proportion of 
protein accompanying carbohydrates in corn. 
A ton of dried brewers’ grains contains 884 pounds of carbohy- 
drates and 430 pounds of protein. Now, in corn, 884 pounds of 
carbohydrates would be accompanied by 79 pounds of protein (884 xX 
0.097 =79). The nutrients in a ton of dried brewer’s grains may 
thus be classified as follows: 
Pounds 
Carbohydrates, 884 pounds, proportional protein. ...-............2ceeceeeeceee 79 
| excess protein. 222.002 ou ee 351 
Motalproteim..2 255s Oe ol eee en tel 430 
The digestible carbohydrate content of a ton of each of the various 
protein feeds is given in Table IV, first column to the right of the 
double rule. The digestible protem per ton is given in the next 
column. ‘This is the sum of the proportional protein, given in next 
to the last column, and the excess protein, given in the last column. 
The proportional protein in choice cottonseed meal, for instance, 
which is 74 pounds, merely represents the protein obtained in corn 
along with 824 pounds of carbohydrates, which is the amount of the 
latter contained in a ton of choice cotton seed meal. 
The method here outlined is based on the assumption that the 
carbohydrates and ‘‘proportional protein” in a ton of any expensive 
protein feed are worth just what they would cost in the cheap and 
standard carbohydrate feed used as a basis of comparison (corn in 
Table IV). 
The first 11 columns of figures in Table IV give the value of the 
carbohydrates and proportional protein in a ton of each of the 
various nitrogenous feeds when the price of corn is as shown in the 
column headings. 
When corn is worth more than a dollar a bushel, the value of the 
carbohydrate and proportional protein given in Table IV may be 
easily obtained by either combining the figures given in two columns 
or by adding to the values given in one column a proportional part 
of the values given in another. For example, when corn is worth 
$1.50 a bushel, double the amounts given in column headed ‘‘$0.75”; 
when it is worth $1.15 a bushel add to the values given in column 
headed ‘‘$1.00”’ one-third the amount given in column headed 
°° $0.45.” 
To illustrate the method of arriving at the cost of a pound of 
excess protein, let us assume that corn is 60 cents a bushel and 
peanut cake is $30 a ton. In the column headed ‘‘$0.60” we find 
