22 BULLETIN 1447, U. S. DEPARTMENT OF AGRICULTURE 
TABLE 20.—Estimated cost per head of keeping work stock, 1923 and 1924 
1923 1924 
Item Tractor farms Nontractor farms Tractor farms Nontractor farms 
Quantity| Cost Quantity} Cost Quantity] Cost Quantity! Cost 
Feed: Pounds | Dollars | Pounds | Dollars | Pounds | Dollars | Pounds | Dollars 
NB Ee, eed oe ae ae 2,177 16. 32 2, 815 FALL DAG 14. 69 2,815 19. 00 
Straiwesse eee 558 . 84 425 . 64 558 . 84 425 . 64 
Chafit st haus 5, 373 14. 78 3, 820 10. 50 5, 373 13. 43 3, 826 9. 56 
Barle yee were! 348 6. 09 263 4. 60 | 348 6. 09 263 ~ 4.60 
Oss rarest se 88 1. 54 108 1. 89 88 1. 54 108 1.89 
Wheat <2 toes 199 3. 08 151 2. 34 199 3. 94 151 2.99 
Mixed feed_______ 126 PPA 25 . 50 136 Dele, 25 . 50 
Salta kh. Seo ee ee ree ESD FEEL C Ee be FOO eae eee sx soo Ae eo .39 
Graimnpastures— |=. eae 5 pls Ga eae meee 1 S092 2% == 2 1 394|h2 22 We I/ 
Other pasture: __ | 5) OF98 i |'FsE-0 LA 9. 26a cae Sh3ha|eeeeaeee 8. 33 
Totaliieeg= = =- 5 |e = ee Edit hee a Bee 2s Doi | ae reas $a eae RR LE 2 49. 07 
Choreilabors =. eae eee B29 hi peetsne eae FO Wi|bxeore name, 82297 [esse eee: ted 
Harness and building 
Charge ee | ee GiOls |= ees G8 28i5| Seas 6.0] |S eaw es 6. 28 
Veterinary service____|__________ BY ONG pine ae Ba mine 5 Sens phi OAD | Gi eee 34 
Shoetn gece: “Se ss tg kes Basa 682 Pts Es TLE sg Sele (ie dal (een Re oe 11 
Heedseninding-) = aaa ee MOG clon vesen pee AOS | siege se ae S063 eee . 08 
DEprectatl Ons su | eases SFiishel dV | ete seein Lee Eek! esl aah 5286l | S22 Sees. 5. 80 
Interests 2 +r: 12 gaa | Rees G100;|sgs5e Sustt Gad |e sree! pio 5, 34 
Motalts *.e eel See ae S35S3 sea ee eerie (8/96) |e ee TOESC Al ee oa See 74. 72 
RELATION OF HOURS WORKED PER HEAD PER YEAR TO THE COST OF KEEPING 
WORK STOCK AND THE COST PER HOUR OF HORSE WORK 
The cost per hour of horse work for each farm was computed by 
dividing the total cost of keeping the work stock by the total annual 
hours of horse work for each farm. In general, as the hours worked 
per head per year increased, there was some increase in the cost per 
head of keeping work stock, but a very much greater decrease in the 
cost per hour of horse work. This relationship is clearly shown in 
Table 21. 
TABLE 21.—Relation of hours worked per head per year to the cost of keeping 
work stock and the cost per hour of horse work on 20 tractor farms, 1922 
a ae Net cost | Cost per 
H A of keep- | hour of 
ours worked per head per year Farms | worked ing one nore 
per head horse work 
per year 
Number | Number | Dollars Cents 
Less than 500) \3 = 2. se (Aste ee. SL See ge eee 5 359 87 24 
Es OTUs Hope sts) | ka pee ee oan Ne ae SAR OLS St PISS es ed Se 6 596 89 15 
Go0iand overt. a. at es OS ee PP at wi Ae Sees 9 786 | 94 12 
RELATIVE ECONOMY AND EFFICIENCY IN USE OF HORSES AND 
TRACTORS 
To warrant the purchase of a tractor, it is evident that a man 
should be able to reduce the number of work stock kept, or in some 
other way make changes which will increase the economy or efficiency 
of his farming operations. 
In the following tables the farms on which tractors were owned 
are compared with all nontractor farms, the average size of which 
wat Secs 9 
a St fe 
Ni came ale re i 
