36 
BrXLETIX 154?, r. S. DEPAETMEXT OF AGEICTLrCBE 
HOURS 
JAN. 
10 20 
FEB. 
1020 
MAR 
10 20 
APR. 
10 20 
MAY 
10 20 
JUN. 
1020 
JUL. 
10 20 
AUG. 
10 20 
SEPT. OCT. 
10 20 1 10 20 
NOV. 
10 20 
DEC. 
10 20 
HOURS 
11 
10 
9 
8 
6 
5 
4 
3 
2 
1 

HOURS 
11 
to 
s 
8 
7 
6 
5 
4 
3 
2 
1 

1 
! 
■ 1 
i 1 
1 , 
i 
! : 
i ; 
1 ] 
11 
10 
9 
8 
7 
6 
5 
4 
3 
2 
1 

HOURS 
11 
10 
9 
3 
7 
5 
5 
4 
3 
1 

MAN LABOR 
WHEAT 
BASED ON COST ACCOUNTING DATA 
FROM 
WESTERN NORTH DAKOTA 
= 
1 ■ 
1 1 
: 
' 
- 
1 
, 
1 i 
I 
1 
1 
1 
i 
i i ■ 
1 
■ 
i 
j 
ll 
1 ijL 
' 1 
1! 
22.4 1 15.2 
.3 
1 26.9 1 29 6 
5.6 
PERCENTAGE DISTRIBUTION 
} 
34.0 
23.3 
19.0 
15.9 
7.8 1 
1 ; 
j i 
! i 
1 1 
II 
1 I 
1 
: 1 
' i 
HORSE LABOR 
! 
1 ■ — : 
1 ■ ^ , 
; 1 
' ! ^ : 
: i 
1 ! 
1 
i 
1 
1 
1 
1 
' 1 
1 
1 
II 
1 
iil 
y 
1 
1 
1 
■ 
1 
b 
L 
■ 
■ 
1 
10 20 
JAN. 
10 20 
JFEB. 
10 20 
MAR 
10 20 10 20 
APR. MAY 
10 20 
JUN. 
10 20 
JUL 
10 20 10 20 10 20 
AUG. SEPT. OCT. 
10 20 
NOV 
10 20 
DEC 
Fig. 39.— Distribution of man labor and horse labor per acre for 16 farms, representing the production 
of 960 acres of wheat. On 11 of these farms the thresher furnL<:hed a part or all of the crew for thresh- 
ing. Black bars indicate total hours spent per acre during 10-day periods, tl'. S. Dept. Agr., De- 
partment Bulletin 1000) 
