BULLETIN 338, U. S. DEPARTMENT OP AGRICULTURE. 



Table II. — Walking plows — relation of work done annually to service and cost per acre 

 and per day used on 1,165 farms. 



Range of area covered annually . acres . . 



lto20. 



21 to 30. 



31 to 40. 



41 to 50. 



51 and 

 over. 



Average. 





263 

 15.6 

 12.5 

 195.0 

 115 

 9.0 



407 



28.0 



12.2 



341.6 



204 



10.4 



292 



39.6 



11.7 



463.3 



269 

 12.8 



120 



48.4 

 11.0 

 532.4 

 291 

 14.0 



83 

 68.5 

 8.6 

 589.1 

 300 

 15.1 





Average area covered annually acres. . 



32.9 

 11.7 





384.9 





224 





11.8 





$8.00 

 17.25 

 3.25 



$9.25 

 24.64 

 3.66 



$11.50 



25.27 



4.45 



$12. 00 



27.28 



4.84 



$13. 00 



27.95 



3.78 



$10.00 





23.99 





3.86 



Total of depreciation, interest, and 



28.50 



37.55 



41.22 



44.12 



44.73 



37.85 







Cost of walking plow: 



SO. 248 

 .146 



$0. 184 

 .107 



10. 153 

 .089 



$0. 151 

 .082 



$0. 149 

 .076 



$0. 169 





.098 







The average cost of new walking plows of the average size shown 

 in Table I is $10. Even though the heavier plows cost more money, 

 the machinery and interest charges per acre and per day progressively 

 decrease, as more work is done annually by the plow. There is a 

 uniform decrease in the cost of repairs per acre as the acreage plowed 

 annually is increased. The size and weight of the plow also increase 

 with the increasing acreage. The average cost per acre for repairs 

 is $0,062. The repairs made to a plow during its life amount to 

 more than twice its first cost. 



Table III. — Sulky plows — relation of work done annually to service and cost per acre 

 and per day used on 294- farms. 



Range of area covered annually acres. 



Number of records included 



Average area covered annually acres. 



Years of service rendered 



Acres covered during life 



Days actually used during life 



Average width of plow inches. 



Cost when new 



Total cost of repairs during life 



Totalinterest during life at 6 per cent 



Total of depreciation, interest, and repairs during life 



Cost of sulky plow: 



Per day used 



Per acre plowed 



1 to 20. 



14.3 

 11.3 

 161.6 

 83 

 11.0 



$40. 00 

 14.92 

 14.92 



69.84 



$0. 841 

 .432 



21 to 40. 



150 

 32.8 



7.0 

 229.6 



108 

 13.1 



$45. 00 

 15.75 

 10.78 



71.53 



0.662 

 .311 



41 and 

 over. 



55 



55.1 



6.2 



341.6 



150 



16.5 



$47. 50 

 19.65 

 10.29 



77.44 



$0. 516 

 .229 



30.9 



8.1 



250.3 



119 



13.3 



$42.50 

 17.17 

 11.58 



£0.590 

 .284 



THE SULKY PLOW. 



The sulky plow (Table III) is much less generally used in western 

 New York than is the walking plow, only 294 being reported as com- 

 pared with 1,165 walking plows. Greater acreages are plowed daily 

 per plow than with walking plows, and the number of days of work 

 done annually by the sulky plow is somewhat less than for the walking 

 plow. A sulky plow requires three horses for its proper operation, 

 and this increased power applied to the implement results in greater 



