20 BULLETIN 627, U. S. DEPARTMENT OF AGRICULTURE. 
largest outfits, which show about the same efficiency as the small 
ones. It is also interesting to note that the number of bushels 
thrashed per day per man with these small combines is usually equal 
to and sometimes greater than the amount of grain thrashed per day 
with the small thrashing outfits used in the East. When to this is 
added the fact that two men have covered almost as great an acreage 
in a day with a combine, cutting, thrashing, and sacking the grain, as 
two men could cover with a binder, cutting, binding and shocking, 
the saving which is accomplshed through the use of combines is 
readily apparent. ns 
In order to ascertain the cost per bushel for thrashing with a 
combine it is, of course, necessary to consider depreciation, interest on 
investment, repairs, and operating expenses of these outfits. (See 
Tables X, XI, and XII.) 
TABLE X.—Overhead expenses per year, per day, per acre, and per bushel; aver- 
age cost and estimated life of, and acres cut annually by, different sized com- 
bines (65 reports). 
Average annual overhead expenses on combines. 
H 
| 
| ee Aver- 
, | a ‘ sti- age 
Width | she bas Aver- | mated. | acres 
g 68 A | Interest | cact, | life in | cut an- 
wath. epre- | oninvest- F | : 
Total. | ciation. | ment at SEES Bushel | ay i bee 
6 per cent. Day. | Acre.3 | (30-bushel | ‘ 
| | | see) 
oe Gn Mateda ia AER ev oe 
Feet ; | 
7 | $172.49 | $106.49 $33. 00 $33.00 | $9.10 | $0. 734 $0.0244 | $1,100 10. 33 235 
184.04 112. 04 36. 00 36. 00 9.30 . 684 0228 1, 200 10. 71 269 
12} 233.26 115. 41 50. 55 67. 40 8.95 - 450 - 0150 1, 685 14. 60 519 
14 | 233.31 114. 59 50. 88 67. 84 9.73 - 472 - 0157 1, 695 14. 80 494 
16 | 209.05 87.95 51.90 69. 20 6. 58 . 244 - 0081 1, 730 19. 67 858 
18 | 269.37 127.06 60. 99 81.32 8.35 - 269 - 0090 2, 033 16. 00 1,000 
20} 310.05 146. 25 70. 20 93. 60 7. 93 . 233 - 0078 2,340 16. 00 1,330 
24} 425.00 250. 00 75. 00 100. 00 8. 92 213 - 0071 2, 500 10.00 2, 000 
1 Exclusive of overhead charges for shelter, taxes, and insurance. 
2 Figured at 3 per cent of first cost for seven- and nine-foot sizes, and 4 per cent of first cost ofall larger 
sizes. (See text.) 
3 Based on figures shown in or derived from Table IX. 
TABLE XI.—Labor costs per day, per acre, and per bushel for different sized 
combines and crews, man-labor being considered as worth $2 and horse-labor 
$1.20 per day of 10 hours (65 reports). 
| : 
Labor cost per day. Labor cost per acre.! Total 
man- and 
Width of cuts and. erews mest commonly BOR: 
with each outfit. abor 
Man- | Horse- Man- | Horse- 
Total. | jabor. | labor. | T°! | jabor. | Iabor. | COSt Per 
bushel. 
Mpeehs amen? S horses +3 6.2. 3 s2s eee aes $13.60 | $4.00] $9.60] $1.10} $0.32} $0.78 $0. 0365 
DHCELS 2INeE LO MIOTSES oo ancee eee eee 16. 00 4.00] 12.00 1.18 .30 . 88 . 0392 
iZieers 4 men 22/horses 22s. 323.5 SSS 34. 40 8.00 | 26.40 1.73 -40 1.33 . 0576 
SCC OMe 24 TOTSES so). coc che ee oe 38.80} 10.00] 28.80 1. 88 .48 1.40 . 0628 
IG feets75 mien, 28 horses 22 3. sos scks wots 43.60} 10.00] 33.60 1.61 .37 1.24 . 0538 
AS HCOL to RMeN OU HOTSCS@ oe 5. ace cesar oes 46.00} 10.00] 36.00 1.48 8%. 1.16 - 0495 
WD ifeet 5men, 30 horses) s2bs 2b stk zee 46.00 | 10.00] 36.00 1.35 .29 1.06 . 0451 
1232 | . 29 1.03 . 0438 
MrICOle) GAME SOMOTSOSS oo sac scan eel eres = 55. 20 12.00 | 43.20 
1 Based on acres and bushels per’ day as shown in Table IX. 
— , 
