44 BULLETIN 1202, U. S. DEPARTMENT OF AGRICULTURE. 
CHANGE IN SIZE OF FARM. 
Table 48 shows the changes in size of the farm in the different areas. 
Twenty-seven of the 354 tractor owners had purchased their machines 
when they started farming and the reports of these men are not in- 
cluded. Of the 327 farms, 191, or 58 per cent, had not been changed 
in size, 114, or 35 per cent, ‘had been made larger by an average of 166 
crop acres, ‘and the remaining 22 had been decreased by an average of 
111 crop acres. For all farms there was an average increase of 50 crop 
acres after the tractors were purchased. The increase was greatest in 
the western area, 98 crop acres, and least in the southern area, 18 crop 
acres. About 40 per cent of the tractor owners in the western and 
northern areas and only a little over 25 per cent of those in the south- 
ern area had increased the size of their farm. 
The reports of the Bureau of the Census show that between 1910 
and 1920 there had been an average increase of 11 improved acres 
per farm in the southern area, 230 in the western area, and 16 in the 
northern area. While the increase in the size of these farms after 
tractors were purchased was doubtless greater than the increase in the 
size of all farms during the same time in these areas, it is probable that 
the tractors were not “primarily responsible for the i increase, as there 
was also an average increase of about 45 crop acres on the 85 farms 
where tractors were not owned. (See Table 64.) 
TaBLeE 48.—Change in size of farm after purchase of tractors. 
No change in 
SE Increased in size. Decreased in size. All farms. 
Total * A 
num- Average size. verage size. verage size. 
Area. ber of 
farms. |Num-| AVel- |Num- Num- 
ber. or ber. | Before ber. | Before Before 
‘ ur- 1921 ur- 1921 es 1921 
chase chase 
Crop Crop Crop Crop | Crop | Crop | Crop 
acres acres. | acres acres acres acres acres 
Sotithern. .....- --:. 116 75 250 31 201 309 10 353 210 245 263 
WOSEOTII... <2. 54-2 96 52 498 38 318 576 6 367 302 419 517 
INiorthern...=-...:. 115 64 269 45 220 347 6 309 201 252 296 
MOEA s os 327 191 324 114 247 413 22 344 233 | 299 | 349 
CHANGES IN WORK STOCK. 
Before the tractors were purchased the 327 men had been farming 
an average of 299 crop acres and keeping 9.8 head of work stock—one 
for each 30 crop acres. In the southern area there had been one horse 
for each 26 crop acres, in the western area one for each 34 crop acres, 
and in the northern area one for each 31 crop acres before the tractors 
were purchased. These men had been keeping practically the same 
number of work stock in proportion to the size of their farms before 
they purchased tractors, as the men who were farming with horses only 
were keeping in 1921. (See Table 58.) In Table 49 the ‘‘ work stock 
per farm if tractors were not used”? was determined by dividing the 
average size (crop acres) of the farms in each area by 26, 34, and 31, 
respectively. The “work stock per farm, 1921” and “ necessary work 
stock per farm” are the same as given in Table 27. On the average 
