IRRIGATION TOOLS AND DEVICES 



439 



FIQ. 162. Frieze water register. 



256. Ridging and furrowing. The 



field-ditch method of irrigation requires 

 only that a few rather small furrows 

 may be made to assist in guiding the 

 water over the land. These furrows are 

 ordinarily made by the point of the 

 hoe or as a very shallow plow furrow. 

 The check, border and basin methods 

 of irrigation require that ridges or 

 levees be thrown up around the plots. 

 For this purpose any of the ordinary 

 farm implements may be employed, 

 although special "ridgers" and "crowd- 

 ers" are made and used on many 

 farms. 



The furrow system of irrigation 

 requires that parallel, uniform furrows 

 be made for guiding the water over the 

 land. These may be made by hand with a hoe, but only 

 with great labor. Numerous devices have been proposed 

 for making uniform furrows with horse labor. The shovel 

 attachment to the cultivator has been used, but with 



