s BULLETIN 1198, U. S. DEPARTMENT OF AGRICULTURE. 
In Cheyenne County, Nebr., where tractors were owned, a greater 
percentage of the acreage was covered for most operations than where 
tractors were not owned, and a much larger percentage of this work 
was performed by the tractor than by horsepower. Notwithstanding 
this fact the man labor per acre was 4.1 hours less for the farms where 
tractors were used. On the other hand, in McPherson County, Kans., 
and Garfield County, Okla., about the same amount of total work was 
done on the farms in each group. However, the percentage of this 
work done with horses on the farms where tractors were owned was 
much greater in these two counties than in Cheyenne County, Nebr., 
resulting in a saving in time of only one man hour per acre for farms 
on which tractors were owned. 
These comparisons show that the use of tractor power in wheat 
production results in a material saving of time, the amount of which 
depends largely on the intensity of use of the tractor. 
TaBLE 5.—Efect of use of tractor on total man and horse hour requirements per acre, 
winter wheat, 1920. 
Farms ated by hors = 
ee y DOS | Farms operated by horse and tractor power. 
ff faems, OP cropacres 23 farms, 374 crop aeres per farm. 
pet farm. 
Cheyenne County, Nebr. 
i = she Percentage of 
| Hours per acte. pancne Hours per acre. (SEs Se. 
| ageoi | 
acreage | 
aa -, | covered.) y¢ : ‘Man and Man and 
oe Horse. Man. Horse. | Tractor.| pore | tractor. 
nS SS 
Labor and power: d : : | 
Prepareland and seed........] 3.8 fe a ee 0.8 1.2 peeoteees 
Harvest and market. .-..-..-- 6.6 10 O'S LD wea 43 a Soe ee 
LNT EST ee OU a Ss ae eae 1b. pie fod Hl Bey SE * 6.3 5.7 | LUST Bien See a Seen oe ee 
Wheai acreage: : 
Blower eee ies eae 30 | ee Se ee ee ee i 538 
Disked.....- SRE PI SSE ten 29) Ay Rae (ee aha LS ae 1 83 
arrowed 2-3-5 ee ee $2 ee ee eee 19 5 
Brg. ee ey Le ee Or en ey 100;f ae ee fete. 30 
BEBE oe es 8 eee oe ee 1D eee ee 22 | 78 
24 farms, 177 crop acres a o peo se 
per farm. 13 farms, 245 crop acres per farm E 
P g 
Hours per acre. excentage of 
Percent- acreage covered. 
age oi | ae 
eel | Man and|Man and 
; =. | covered.| eer Fes an and Mana 
Man. | Horse. Man. | Horse. | Tractor. horse. tractor. 
Labor and power: | | 
Prepareland and seed... ..--- 4.3 ARS Ss ee } 3.2) 6.9] 1.3) Se eee 
Harvest and market... ....._- 4.3 fat eee 4.4 5. 6 | 212 Se eee 
die ee oC eee eee 8.6 7S: Bh Ree Ae 7.6 (pas [PE eee Le Se 
Wheat acreage: i 
a Wa oe. eed ee ( a Bee [<2 [Eee hes 74 
[hoe 277 Re eal ES SP ae Rae eee Pree 9G |= 27 canes 14 4 
(Ech ee ee es | Bee ee ee 72D Weis) bas eee 140 7 
Sed | 2. SS OR eS Sd 10 1E Se ner ee peers = soe 80 20 
Cig ee ee are a | IOP ee a eae oe | 47 53 
1 The percentage of the acreage covered with the harrow refiects both the acreage harrowed and the 
number Oi times harrowed. 
. 
| 
