IRRIGATION 



249 



vised for each field and each orchard. Often a system 

 must be provided to remove seepage water from lower 

 lands, and, where seepage waters evaporate, even to pre- 

 vent or cure alkali. In planning the irrigation scheme 

 a plan of crop rotation should be also devised which will 

 arrange for the most profitable use of the land and water. 



O* IR 

 CHC 

 Of IK 



<jCNCfTAL UOPC 



Figure 145. Drawing of a model of irrigation plan displayed in plaster at the St. 

 Louis World's Fair. 



That these should be devised at the same time is mani- 

 fest, since the system of applying the water and the 

 times of applying it must be adapted alike to all crops 

 in the rotation scheme. The organization of farms, and 

 especially the planning of irrigated farms, is destined to 

 become a technical profession needing men skilled to 

 assist the farmer in working out his own knowledge and 

 ideas into an organized plan which will enable him to 

 make profits. Like rural architecture, the planning of 



