REQUIREMENTS OF FIELD CROPS. 
35 
HOURS 
JAN. 
10 20 
FEB. 
1020 
MAR. 
10 20 
APR. 
10 20 
MAY 
10 20 
JUN. 
10 20 
JUL. 
10 20 
AUG. 
10 20 
SEPT. 
10 20 
OCT. 
10 20 
NOV. 
10 20 
DEC. 
10 20 
HOURS 
11 
10 
9 
8 
7 
6 
5 
4 
3 
2 
1 

HOURS 
11 
10 
9 
8 
7 
6 
5 
4 
3 
2 
1 

11 
10 
9 
8 
7 
6 
5 
4 
3 
2 
1 

HOURS 
11 
10 
9 
8 
7 
6 
5 
4 
3 
2 
1 
O 
MAN LABOR 
OATS 
BASED ON COST ACCOUNTING DATA 
FROM 
WESTERN ILLINOIS 
■ 
. 
1 
1 
_ 
1 
■ 
i 
. 
1 
30.5 | .6 
1.4 
28.6 | 36.2 | 2.6 
PERCENTAGE DJSTRIBUTION 
1 
51.5 
1.1 
.6 
20.5 
24.7 
1.5 
HORSE LABOR 
■ 
■ 
L 
. 
ll 
■ 
1 
ll 
_ 
. 
1 
. 
10 20 
JAN. 
10 20 
FEB. 
10 20 
MAR. 
10 20 1 10 20 
APR.| MAY 
10 20 
JUN. 
10 20 
JUL. 
10 20 
AUG 
10 20 
SEPT 
10 20 
OCT. 
10 20 
NOV. 
10 20 
DEC. 
Fig. 9.— Distribution of man labor and horse labor for 22 farms, which produced a total of 891 acres of ( 
Black bars indicate total hours spent per acre during 10-day periods. 
