36 
BULLETIN 659, L T . S. DEPARTMENT OF AGRICULTURE. 
Table XV shows the distribution of costs on cotton when different 
yields per acre are obtained. The cost of each crop of cotton on the 
Hi farms was computed separately, so that the averages are for 
crops and not for farms. The average number of days of man labor 
per acre increases with the yield, due to the increased amount of 
labor required for picking. However, the increase in yield from 
170.3 pounds to 344.6 pounds is 102 per cent, while the increase of 
man labor is only 41 per cent. The average amount of horse labor 
required per acre for the crops making the lowest yields is 3.12 days, 
while on the crops making the highest yields the number of horse 
days required is 3.31. This is an increase of only 7 per cent. This 
table further shows that the rent per acre increases as the yield in- 
creases. The rent of crop land making yields of 170.3 pounds is 
$4.72, while that of the land making a yield of 314.6 pounds of lint 
is $5.80. 
There is an in- 
crease in man labor 
cost per acre from 
$8.75 on the crops 
making low yields to 
$12.80 on crops of 
high yields, being an 
increase of 46 per 
cent. There is -:.a 
slightly greater in- 
crease than in the 
number of man days 
required per acre on 
the same farms. There is scarcely any increase in cost of horse labor 
as the yield per acre increases. 
The ginning cost, being a charge based directly on the quantity of 
cotton, increases directly with the yield. 
The total cost of lint per acre increases 33 ,per cent, while the 
increase in value is 102 per cent. The yield per acre increases more 
rapidly than the cost per acre, so that as the yield increases from 
170 pounds to 344.6 pounds the cost per pound decreases from 10.5 
cents to 6.7 cents. 
The same results were found for corn as for cotton, with only very 
slight variations. Figure 11 and Table XVI show the relation be- 
tween yield per acre and the cost per bushel. When corn yields less 
than 18 bushels per acre, the cost is greater than the market value. 
The average yield of corn for the region was 25.6 bushels per acre 
at an average cost of 58.4 cents per bushel. As the yield increases 
beyond the average the cost continues to decrease, but not as rapidly. 
♦i.50 
-J 
id 
^ 1.00 
09 
£ 
0. 
8 .50 
O 
BUSHELS PER ACRE 
10 *0 30 40 
AVERAGE 
PRICE 

Fig. 11.- 
-Relation of yield to cost of production of corn 
(115 farms, Ellis County, Tex.). 
