REQUIREMENTS OF FIELD CROPS. 
43 
HOURS 
JAN 
10 20 
FEB. 
10 20 
MAR. 
10 20 
APR. 
10 20 
MAY 
10 20 
JUN. 
1020 
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 
O 
HOURS 
11 
10 
9 
8 
7 
6 
5 
4 
3 
2 
1 

MAN LABOR 
ALFALFA 
BASED ON COST ACCOUNTING DATA 
FROM 
SOUTHERN WISCONSIN 
■ 
i 
s 
1 
1. 
S 
II 
J 
£- 
■■ 
i 
m 
40.5 | 28.3 | 16.5 | 14.4 
PERCENTAGE DISTRIBUTION 
34.9 
30 4 
17.7 
16.4 
.6 
HORSE LABOR 
,1 
J 
m 
I. 
I 
J 
. 
10 20 
JAN. 
10 20 
FEB. 
10 20 
MAR. 
10 20 
APR. 
10 20 
MAY 
10 20 
JUN. 
10 20 
JUL. 
10 20| 10 20 
AUG. SEPT. 
10 20 
OCT. 
10 20 
NOV. 
10 20 
DEC. 
Fig. 13.— Distribution of man labor and horse labor for 20 farms, representing the production of 128 acres 
of alfalfa. The reports show that the first and second crops may overlap during the period July 10 
to 20. Black bars indicate total hours spent per acre during 10-day periods. 
