46 



BULLETIN 648, L T . S. DEPARTMENT OF AGEICTJLTTJRE. 



ments and machinery. This means that in its present condition the 

 equipment Trill have an average life of approximately six years. In- 

 terest, taxes, and insurance amount to about 10 per cent of the value 

 of the equipment, and repairs slightly less than half of that amount. 



PRODUCTIVE WORK UNITS. 1 



For the purpose of distributing the labor costs among the different 

 crops and other enterprises by the method here used, it was necessary 

 to ascertain the amount of man and work-stock labor expended on 

 each. This was determined for and applied to each enterprise on each 

 farm separately. The average number of days of productive labor 

 required per acre of each of the principal crops is given in Table 

 XVIII. Since there is a close relation between crop yields and 

 amount of labor required, the average yields are also shown. 



Table XVIII. — Productive days of man and mule labor expended per acre and 

 average yields of the principal crops (Brooks County, Qa.). 



Crop. 



Xumber 



of 

 records. 



Average days pro- 

 ductive labor per 

 acre. 



Man 

 labor. 



•Mule 

 labor. 



Average yield per acre. 



Cotton, Upland a 



Cotton, Sea Island a 



Corn(solid) 



Corn (planted with peanuts) a... 



Peanuts harvested (solid) 



Peanuts harvested fin corn) 



Peanuts "hogged-off" (solid) a .. 

 Peanuts "hogged-off" (in corn) a 



Oats 



Oat hay 



Rye 



Rye or oats, pastured 



Cowpea hay 



Sorghum silage 



Watermelons 



Sweet potatoes (harvested ) 



Sweet potatoes (hogged-off ) 



Irish potatoes 



Sugar cane 



61 

 120 



15 



5 



53 



115 



80 



15 



12 



23 



65 



4 



46 

 25 

 19 

 4 

 24 



13. 91 

 16. 39 

 3.32 

 2.50 



23.10 



19. 43 

 3.33 

 1.90 

 1.34 

 1.50 

 1.18 

 .55 

 1.92 

 6.72 

 5.36 



10. 33 

 5.82 

 5.88 



26.24 



5.03 

 5.20 

 3.12 

 2.00 



2.92 

 1.10 

 2.67 

 1.21 



1.88 

 1.70 

 1.89 

 1.12 

 2.05 

 6.80 

 5.00 

 4.99 

 2.85 

 3.82 

 14.40 



299 pounds lint. 

 214 pounds lint. 



14.3 bushels. 



71 pounds fodder. 



12.4 bushels. 



84 pounds fodder. 



37 bushels. 



29 bushels. 



(») 



( c ) 



16.2 bushels. 



831 pounds. 



7.9 bushels. 



1,092 pounds. 

 14 tons. 

 0.5 carload. 

 108 bushels. 



69 bushels. 



307 gallons sirup. 



a Includes both wage and cropper crops, b 0.71 bushel of seed picked, c 0.33 bushel of seed picked. 



The relationships of the various elements of cost, yields, and 

 other factors to the different phases of farm organization and effi- 

 ciency have already been considered elsewhere. In the following 

 pages, therefore, are presented only details of costs that have not 

 been previously discussed. 



J A work unit is an average day's work. 



