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= 
42 BULLETIN 1447, U. S. DEPARTMENT OF AGRICULTURE 
sacked should be taken into consideration. This loss occurs while 
the bags are being sewed, through damage to the bags in the field by 
mice, and through torn and leaky bags during handling and hauling 
to the warehouse. 
COMPARATIVE COST OF HARVESTING, THRESHING, AND MARKET- 
ING WHEAT WHERE COMBINES AND WHERE HEADERS AND 
STATIONARY THRESHERS WERE USED 
In Table 39 is shown the comparative cost of harvesting, thresh- 
ing, and marketing wheat where small combines and where headers 
and stationary threshers were used. Table 40 shows the same com- 
parison where large combines were used. In making these com- 
parisons standard requirements in numbers of men and horses have 
been set up wherever possible. The same horse rate for all horse 
Fic. 12.—Harvesting and threshing bulked wheat with a 16-foot cut tractor-drawn 
combine. Only a limited amount of grain was handled in bulk. Wheat harvested 
in this manner showed a slightly lower cost per bushel than when sacked 
work and the same man-labor rate for marketing was used for each 
group. The man-labor cost for harvesting with a combine and with 
a header and stationary thresher reflect the actual wages paid for 
this work. 
With a small combine 7 less men were-used and 2.13 less man hours 
per acre were required than when a header and stationary thresher 
was used. Where a large combine was used there was a saving of 
3 men and 1.83 man hours per acre. The small combine used 4 less 
horses, but the large combine required 15 more than the header and 
stationary thresher. The number of horse hours per acre was 
greater for both the large and small combine than for the header 
and stationary thresher. The stationary thresher showed a total 
additional cost over the small combine of 95 cents per acre and over 
the large combine an additional cost of 26 cents per acre. 
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