IRRIGATION 



255 



checks. Where the slope of the ground is such that the 

 supply ditch is carried across the field in an irregular line 

 following the contour, the checks are made to correspond 



..:■..,. 







After irrigation Investigations. U. S. Dept. Agri. 



Fig. 210. Slip-joint pipe used for irrigating alfalfa 



After Irrigation Investigations, U. S. Dept. Agri. 



Fig. 211. Check method of irrigating peaches 



