COST OF PRODUCING WINTER WHEAT IX OREGON 
19 
Table 17. — Relation of size of farm to cost of important factors of production and to 
returns on 27 tractor farms, 1921 
Item 
Tillable acres per farm 
5.50 and 
551 to 
801 to 
under 
800 
1,050 
6 
8 
6 
560 
921 
1,238 
458 
680 
890 
5.8 
11.7 
13.8 
.8 
2.3 
1.83 
1.46 
1.80 
3.66 
3.39 
3.10 
296 
344 
380 
10.3 
12.0 
16.8 
44 
57 
53 
2.44 
1.63 
1.63 
14.4 
14.5 
11.7 
784 
912 
919 
1.71 
1.34 
1.04 
585 
692 
800 
1.28 
1.02 
.90 
34.34 
35.51 
32.98 
22.3 
25.5 
23.1 
1.54 
1.39 
1.42 
1,120 
2,996 
5,471 
2,473 
2,793 
4,069 
-1,353 
203 
1,402 
1,010 
1,082 
1, 133 
.3 
4. 1 
6.4 
52 
150 
5,621 
1,172 
2,996 
1,051 and 
over 
Farm number. 
Average size of farm acres . 
Average tillable area per farm do... 
Months of hired-man labor per farm number. 
Months of unpaid family labor per farm do... 
Hired and family labor expense per tillable acre dollars. 
Total man-labor expense per tillable acre including oper- 
ator dollars. 
Tillable acres per 12 months of man labor (including the oper- 
ator's time) number. 
Work stock per farm do... 
Tillable acres per head of work stock do... 
Work stock cost per tillable acre dollars. 
Cost per hour of horse work cents. 
Tractor cost: 
Per farm dollars. 
Per tillable acre do... 
General farm machinery cost: 
Per farm do... 
Per tillable acre do... 
Net cost per acre of winter wheat do... 
Yield per acre of winter wheat bushels. 
Net cost per bushel of winter wheat dollars. 
Farm income do... 
Interest on farm capitalization at 6 per cent do... 
Labor income l do... 
Operator's labor do... 
Return on farm capitalization per cent. 
Unpaid family labor dollars. 
Returns per farm to capital and unpaid labor do... 
7 
2,032 
1, 595 
27.7 
2.24 
3.19 
482 
17.9 
1.20 
12.6 
I, 225 
1.39 
1,358 
28.5 
1.01 
9,353 
6,744 
2,609 
1,500 
7.0 
9, 353 
1 Minus sign denotes lo.< 
As the size of farm increased, the tillable acres per 12 months of 
man labor and per head of work stock increased. This relationship 
is reflected in the cost of man labor and the work-stock cost per 
tillable acre. The total cost of man labor on tractor farms for those 
farms in the smallest tillable-acre group (550 acres and under) 
averaged $3.66 per acre, and the cost of man labor for those farms in 
the largest tillable-acre group (1,051 acres and over) averaged $3.19 
per acre. Likewise, the work-stock cost in the lowest tillable-acre 
group was $2.44 as compared with $1.20 per acre in the highest 
tillable-acre group. 
For all size groups there was a slight saving in man labor on tractor 
farms as measured by tillable acres per 12 months of labor. 
The number of work stock per farm was somewhat greater on non- 
tractor farms, with the result that the tillable acres per head were 
considerably less on these farms. The fact that there was a smaller 
number of work stock on tractor farms resulted in a work-stock cost 
per tillable acre which was slightly lower than on nontractor farms of 
the same average size for all except the group of from 550 and under 
tillable acres per farm. On the other hand, because the hours worked 
per head per year were lower and the cost per head of keeping work 
stock somewhat higher on tractor farms, the cost per hour of horse 
work on farms of the same average size was higher on tractor than on 
nontractor farms. 
