METHODS 01' Al'1'LYIN-U WATKII. 



147 



country and forcing the water through tho adjacent 

 lands by percolation is somewhat relied upon but will 

 not become generally adopted. The water is dammed 

 and simply forced out through the banks into the ground, 

 and in this way subterranean moisture is aH'ordcd the 

 surface soil to produce good crops. The plan is rather 





FIG. 54. IRRIGATING A HILLSIDE. 



too expensive in dam building to make it veiy popular, 

 and the operator having no control over the seepage tide 

 would soon find his ground water-logged and too wet for 

 ordinary farm crops. 



Fall and Winter Irrigation. In many sections 

 of the West the system of fall irrigation has been prac- 



