198 



IRRIGATION PRACTICE 



J^?^ rou ^- 





1'AAV'? 



FIG. 36. Flooding from ditches running down the steepest slope. 



The main permanent ditches if made of concrete, are fre- 

 quently put underground, out of sight and out of the way. 

 The water is allowed to escape through stand-pipes into 

 the temporary ditches of the farm. The beauty and often 

 the prosperity of the irrigated farm depend upon the 

 permanent ditches. (Fig. 34.) 



121. Field-ditch or field-lateral method. This method, 



FIG. 37. Flooding from field ditch. 



