DRAINAGE 



221 



m 



Figure 115a. Fresno scraper. 



made to resemble somewhat the common stubble plow 

 and very useful in drainage operations. Either this or the 

 common plow is often used to break up the soil before 

 it to one side with the reversible machine, or 



Figure 116. Wheel scraper, lowered for filling. 



picking it up with the wheel or slush scraper, or throw- 

 ing it into wagons with the shovel or spade. 



Vertical and special drains. While most farm drainage 

 can be accomplished by means of either open drains or 



