COST OF USING POWER ON WHEAT FARMS IN OREGON 19 
TABLE 18.—Effect of days of work per year on cost of operating 22 tractors, 1922 * 
] 
Days of work per year 
Item 2 ae 
ess an 
than 30 eel over” 
ERT ACEOLS esa ae eg ee ee al ee See eR number-- 9 7 6 
Average tillable‘acreage per farm ===. St £8 | a ee SS ee acres __ 827 1, 005 1, 588 
Average amount of work per tractor: 
FEL G MCS WOT ke ere aoe ae ees eC ant ee ee eee days_- 20. 63 37. 07 76. 42 
GIST OTN SWOT Kates Se ee eS ea Ee Sey ae Got s=: 1. 56 6. 30 8. 90 
SATE WOT peers eh as er rena CRED nee yee Ae Noe ey a eS doz 22. 19 43. 37 85. 32 
Cost of using tractor: 
HC ee Rs oe ae a ee oe ee EN dollars __ 228. 44 478. 43 966. 17 
GIS ACE GT CASE me essen ee sneer ee Mey tn eile ies eye eye dove: 61. 56 136. 43 280. 83 
TER POULT oe eee eee tt ce ne, Rae eC Ee i oe CE dozs== 173. 38 353. 40 422. 86 
SPSUITATI CR ees ce ee ents ee Se te eh See mete ae Wie es ee C3 Koy I SI at) be oer 8. 83 
BD BPO C1 i] Oe ee Goze |= =.673289 723. 43 740. 84 
AY 2 Sean See cata ag ee We cca ee ee eer do____} 1,137. 27 | 1,691.69 | 2,419.53 
TN GEROS Gee ent ls ee ae tS ee Se SL dol== 130. 11 126. 43 171. 50 
“ROtAIecOStapersthaAClOnse ss= e aee e  ae et  E do____| 1, 267.38 | 1,818.12 | 2,591.03 
PACVerage- cost pend Qhour Gaycot use ki eek ee Ee ee dose 57. 11 41. 92 30. 37 
1 All farms on which a tractor of less than 20 horespower was owned as well as those on which more than 
one tractor was owned or on which an excessive amount of contract horse or tractor work was done have 
been omitted from this table. 
The average number of days of work per tractor for those tractors 
included in Table 18 was 46.1. The variation in the annual days 
of work per tractor was from 13 to 103.6. Increasing the number of 
days of annual use, merely for the purpose of reducing the cost per 
EFFECT OF DAYS OF WORK PER YEAR ON THE COST OF OPERATING TRACTOR 
ANNUAL COST PER TRACTOR IN DOLLARS 
DAYS OF WORK O 500 1,000 1500 2000 2500 3,000 
LESS THAN 30 
(9 TRACTORS) par 
30 TO 60 Sees 
(7 TRACTORS) pele ees 
Jnsurance 
60 AND OVER ; 
(6 TRACTORS) Zo) 
Fuel and Oj!s Rey Repairs Depreciation and Interest SS /nsurance 
Fic. 6.—Cost of repairs, depreciation and interest was larger on the farms where a 
greater amount of work was done, but these costs did not increase in proportion to 
the increase in the number of tractor days of work per year. On the other hand 
there was a rather close relationship between the cost of fuel and oils and the 
number ot days the tractor was used annually 
day or hour of use, is not enough; the tractor should be engaged 
in profitable work. Size of farm is a large factor in determining the 
number of days of profitable use of tractors on these farms. The 
opportunity of custom work is also an item to be taken into con- 
sideration. 
Le SS ee tC 
~ Bemcrutites ) WREST CGPS. md, SeerOme O17 £0 OS Oc ME 4 
mur Gusstiden sume Soe Gee 
