bs 
TRACTORS AND HORSES IN THE WINTER WHEAT BELT. 45 
the 354 men were keeping 3.4 head less than they would have been 
keeping if they had not owned tractors, and they considered that they 
needed 5.2 head less, an actual reduction of about 30 per cent and a 
potential reduction of about 45 per cent. The reduction had been 
createst in the western area and least in the northern area. 
TABLE 49.—Displacement of work stock by tractors. 
Work | 
stock per| Work pte Actual | Potential 
; . Number | farmif |stockper| Jo reduc- reduc- 
Area. of farms. tractors farm, | stock per | 400 per | tion per 
| werenot| 1921. |*" "PB farm. farm. 
| used. ; 
LE eee 120 10.1 7.5 | 5.7 2.6 4.4 
_ | LEIDER Ses Ae gs il eae 107 15.2 10.2 7.4 5.0 7.8 
_ oes St ee eee 127 | 9.6 7.4 6.5 | 2.2 3.1 
eee 34 | Fie 8.3 6.5 3.4 5. 2 
| 
CHANGES IN FEED OF WORK STOCK. 
Each man was asked for an estimate of the change in the amounts 
of grain, hay, and roughage, and pasture consumed per head by the 
work stock after the tractor was purchased, and it was found that 
about three-fourths of them had made some change in their feeding 
practices. The averages of the estimates for each area are given in 
Table 50. Based on the amount of feed consumed per head by the 
work stock on the same farms during the year covered by the inves- 
tigation, the change had amounted on the average to a reduction of 
about 460 pounds of grain and 210 pounds of hay and roughage per 
head. 
TABLE 50.—Average of tractor owners’ estimates of change in feed per head of work stock 
after purchase of tractors. 
Change in annual consump- | Nymber 
s tion per head. : of 
roar perc | if Farmers 
ie Farmers. | g ees 
| Grain. | #4y.ad} pasture. | img no 
fea ches "| change. 
Per cent. | Per cent. | Per cenit. | 
Mmmnnemerene: fable Aa. 2582/7 So oe de 116 —20 | +2 +9 | 30 
SOT 2 Se a eee rere 96 a 5 +5 | 16 
_ USD sob! oy 2S ae gig 115 —17 —t +3 | 32 
(ooo SR ee eae a 327 2] 7 | +6 78 
CHANGE IN AMOUNT OF LABOR USED. 
For each farm the number of months of family labor and of regular 
hired labor used per year before the tractor was purchased and that 
used during the year covered by the investigation were obtained. 
The amount of extra or day labor used was not determined, as on 
practically all of the farms visited extra labor was employed only 
during the harvesting and threshing season, and it was not believed 
that the tractor could have any influence on the amount of such 
