| 
36 BULLETIN 1202, U. S. DEPARTMENT OF AGRICULTURE. 
can produce at low cost. A farmer should not, of course, endeavor 
to use his equipment as many days or hours during the year as possible 
just for the sa iS of reducing the cost per day or hour, for even though 
the cost per day or hour decreases ah increased use the total cost per 
year must increase. 
- 
TABLE 41.—Cost per year and per hour for using tractors of different sizes for drawbar 
work. 
Total 
: Drawbar | cost per Cot ied 
Size of tractor. Number. | work per Peete for a eae 
year. rawbar i kines 
work = 
Southern area: Hours. 
PEI OLS) ps a eae ee 4 SM Me NE eek I er i oe Ses ae 28 360 $447 $1. 24 
B=DIOW wat - te See MSL OE a eters eee Aled el eee 73 368 599 1.63 
A-plow:- fo osu st ooh See ote ee thee ee ee 16 384 720 1.88 
Over 4—plo were. fas tee ON et ee ona et eee 3 160 683 4.27 
Ocala. 2 Non Ste Supe at oe en ea el een eee 120 | 365 588 1.61 
Western area: 
PMOW ode tac, hn o oc sett Dae 2 ete an 34 344 426 1.24 
PLOW crea ie.- anion sec EE ee ee eee eee eee ee 49 350 512 1.46 
AW LOW eo se sapseo orc oe ya Sloan eee ee ee ee 14 350 664 1.90 
Over 42plow-< j2 2202 - 5oo ee se nates See eer ee ee 10 368 673 1.83 
Motels te a Soe OS eae eee ee ee 107 350 520 1.49 
Northern area: 
P71 0) (0) eee a Renter ae eee Be imate Re pe 26 209 304 1. 46 
Bi] 0} (0) ee ae tM IEE CRAM US Sh Pes A tp has cies bay Se 85 203 356 1:75 
ADO Wie dengan veins aaa He acy tte ore ae ene ee eae 10 233 487 2.09 
Over4-plowe. 2. soe eee es ewe Cee ee ee ean 6 127 377 |: 2.97 
Dota tee oe See Se Se ae See oe Nee 127 203 357 1.76 
Allareas: 
PPNOW as oo ores ies, < ein Sa Oe a ee ee eee 88 309 397 1.28 
S-DlOW esl ad. 5 td ooo pe ote eee ees cee ene egesacaee 207 296 479 1.62 
BET LOW sia. oie cists «pnw Ee SR re or re ee ee 40 334 642 1.92 
Oser 4-plow..'- 5220s 2 oete ase eee a ee eee 19 268 617 2. 30 
otal. 2. /fc xg a ee eee ae ee 354 | 302 484 1.60 
The table indicates that since the amount of work done has only a 
slight effect on the annual charges for depreciation, repairs, and in- 
terest charges, a farmer should give prime consideration to the cost 
of fuel and oil and not to the total cost per hour of use when deciding 
whether to use his tractor for operations where it is of doubtful value. 
TABLE 42.—Lffect of hours of use per year on cost of using tractors. 
Average | Hours of} Cost per | Cost per 
Number 
é ‘ hours of | drawbar |} year for | hour for 
Hours of use per year. Peat use per | work per| drawbar | drawbar 
: year. year. work. work. 
2-plow: 
mess than! 200... Sa 6) ac ee 16 160 147 $263 $1.79 
DY US 08) a ey pee a ee oe ls Pal be Ss Be 42 280 258 365 1.41 
BOOM BOOS S.. = Pat ne ace See ae eee 24 494 417 469 ta | 
EMM ONOVGl nc... i oe ee Some ee eee 6 799 669 689 1.03 
3-plow: 
BECAN REA DOU: Soc. US dans seeks ae ee Seem 47 134 116 357 3.08 
PUTCO. ces ok oe. SRE Oe ee eee ee 76 298 232 429 1.85 
UT US a aE ete ARR MORI a, MN TR eae peek oa st ak 56 494 399 555 1.39 
SRM PANG OVER cc eos cco. oe eta tote cee eee eee 28 744 568 665 74 
4-plow: 
BRCS SMS T AN) sooo ance < owes weet. see oe eee 4 115 96 340 3. 5A 
EMO IIS tats oh te a ail kre sae Be on od oe eee 13 309 252 580 2.30 
See ARENDS ea ea ice aias Peis ms Deeg = ee 15 496 379 687 1.81 
Bina dvOVeL- <2 cen. ues Cc eee 8 746 503 809 1.61 
aes Pee 
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