348 DRY-FARMING 



profitable to carry water to the garden in cement or 

 iron pipes so tliat no water may be lost by seejaage 

 or evaporation during the conveyance of the water 

 from the reservoir to the garden. It is also often 

 desirable to convey water to plants through pipes 

 laid under the ground, perforated at various intervals 

 to allow the water to escaj^e and soak into the soil 

 in the neighborhood of the plant roots. All such 

 refined methods of irrigation should be carefull}' 

 investigated l\v the farmer who wants the largest 

 results from his limited water supply. Though such 

 methods ma}' seem cumbersome and expensive at 

 first, 3Tt they will be found, if properly arranged, 

 to be almost automatic in their operation and also 

 very profitable. 



Forbes has reported a most interesting experiment 

 dealing with the economical use of a small water 

 supi^ly under the long season and intense water dis- 

 sipating conditions of Arizona. The source of supply 

 was a well, 90 feet deep. A 3- by 14-inch pump 

 cylinder operated by a 12-foot geared windmill 

 lifted the water into a oOOO-gallon storage reservoir 

 standing on a su]5port 18 feet high. The water was 

 conveyed from this reservoir through black iron pipes 

 buried 1 or 2 feet from the trees to be watered. 

 Small holes in the pipe -^ inch in diameter allowed 

 the water to escape at desirable intervals. This 

 irrigation plant was under expert observation for 

 consideralDle time, and it was found to furnish sufh- 



