26 BULLETIN 726, U. S. DEPARTMENT OF AGRICULTURE. 



Table XIV. — Cleaning data for three Colorado districts (work done by hand). 



District. 



Year. 



Number 

 of farms. 



Acres 

 cleaned 

 per farm. 



Number 



times 

 cleaned. 



Number 

 of men. 



Hours 

 per acre. 



Cost per 

 acre. 



Rocky Ford 



1914-15 



1915 

 1914-15 



52 



42 

 107 



22. 75 

 37.97 

 25.6 



1.21 

 1.09 

 1.06 



1 

 1 

 1 



2.37 

 .91 

 1.12 



SO. 43 

 .17 



Greeley 



.23 



Table XV. — Cleaning data for three Colorado districts (ivork done by man and horse 



labor). 



District. 



Year. 



Num- 

 ber of 

 farms. 



Acres 

 cleaned 

 per farm. 



Num- 

 ber 

 times 

 cleaned. 



Crew. 



Hours per acre. 



Total 



cost per 



acre. 



Man. 



Horse. 



Man. 



Horse. 





1914-15 



1915 

 1914-15 



55 

 56 

 53 



25.2 



37.53 



28.9 



1.44 

 1.44 

 1.04 



1.6 



1.62 



1.34 



2.49* 



3.12 



3.24 



1.73 

 .94 

 .3 



2.90 



2.07 

 .63 



S3. 60 





.41 





.13 







»£**»*» T* 9. *g^.SgS^3* * i tf»» * - «?§ 



Fig. 9. — Removing silt from an irrigation ditch. In order to insure rapid delivery of water when the 

 crop requires it, some work must be devoted to cleaning ditches a few weeks prior to the first run in 

 the canal. 



On farms where the canal and distributing laterals are accessible 

 to horses, silt and other debris that have been deposited can be 

 loosened with a plow and the accumulated material can be removed 

 with a home-made V ditcher (fig. 10). By using horses much more 

 work usually can be done within a limited period than by hand, 

 though it does not necessarily follow that the work can be accom- 

 plished at a lower cost. Where equal amounts of work are involved, 

 the combined crew will undoubtedly have the advantage. The 

 three districts were represented by approximately equal numbers of 

 men who did cleaning with a combined crew. Cleaning was done 

 practically l 1 times at Rocky Ford and Fort Morgan. Greeley 



