AN APPRAISAL OF POWER USED ON FARMS 
11 
farm-management studies, due allowance being made for the kinds 
of soil and types of farming followed and the average weight of 
work animals in the different States. The figures for the power 
developed by tractors, trucks, and stationary units were also com- 
piled largely from information available in farm-management 
studies, together with data obtained from agricultural engineering 
departments of State colleges, manufacturers, the Bureau of the 
Census, and other scattered sources. 
The relative amount of power utihzed varies greatly in the dif- 
ferent States. This variation is caused partly by differences in the 
Horsepower 
5 10 
Vnited States . 
Maine 
New Hampshire. 
Vermont. 
Massachusetts. . 
Rhode Island... 
Connecticut 
Neiv York 
New Jersey. . .. 
Pennsylvania. 
Delaware 
Maryland. 
l/irginia. 
INesfl/i'rg/nia. . 
North Carolina. 
South Carolina. 
Geor^gia _ 
Florida 
Kentucky 
Tennessee 
Alabama. 
Miss is s ippi. 
Arkansas 
Louisiana. 
Texas 
Oklahoma. 
Ohio 
Indiana.. 
Illinois 
Michigan 
tVi'sconsin 
Minnesota.. 
Iowa 
M/'ssouri. 
/^orth Dakota... 
South Dakota...] 
Nebraska. 
Kansas 
Montana. 
INyomin g. 
Colorado. 
NewMexi'co 
Arizona 
Utah 
A/evada 
/daho 
t^/ashington. 
Oregon 
California 
Horsepower 
3 5 10 15 20 25 
(/nl ted States 
Maine 
New Hampshire.. 
Vermont. 
"' 
■H 
^^""""^ 
■MBBH 
■ 
Massachusetts — 
Rhode Island.... 
:s^^ 
Connecticut. 
New York 
New Jersey 
Pennsylvania. . . 
Delaware 
Mary Ian d. 
l/^irginia. 
iVest l/irginia. . . . 
A/orth Carolina.. 
South Carolina.. 
1 II. 
warn 

m^^nM 
wtm^m 
nag 
E- 
Florida 
Kentucky...'. 
Tennessee 
Alabama. 
Mississippi. 
Arkansas 
Louisiana 
Texas 
Oklahoma. 
Indiana 

r*™" 
L— 1_ 
Michigan 
fVisconsin 
Minnesota. 
iowa 
Missouri. 
zzs 
Sb 
vtmmm^ 
^■^nno 
^■■Mi 
MS 
A/orth Dakota.... 
South Dakota. . . . 
A/ebraska 
Kansas 
■■^™"^ 
'~~™"~' 
^^^^^ 



_ _ 
■■KB 
Wyoming 
Colorado 
New Mexico 
Arizona.... 
Utah. 
^^^^ 
-i— 1-1 
" 
■■ 
II IIIIBIIMI 
[ ■—[!■« 

I^HH 
H^^H 
^IHm"" 
E> 
Nevada 
Idaho 
IVashington.... 
Oregon 
California - 
^^^■"l 

' ' 
LMJUllLJU 
IZI^ 
^S 
Fig. 8.— Average primary horsepower per 
farm worker 
Fig. 
-Average primary horsepower per farm 
kind of crops raised, but is also largely the result of the prevaihng 
size of farms, types of soil, chmatic conditions, and usual wages 
paid farm labor. 
The primary power per worker and per farm and the horsepower- 
hours utilized annually per worker, per farm, per improved acre, 
and per hour of human labor, have been computed from Tables II and 
III, and are shown in Table IV. These amounts are shown graph- 
ically in Figures 8 to 11 and 13 to 16. The primary power varies 
from as low as 1 horsepower per worker and 2 horsepower per farm 
in Alabama, to as high as 14.1 per worker and 22 per farm in South 
Dakota, while the horsepower-hours utilized vary from 380 per 
