Preparing land for irrigation and methods of applying water . y the useof lined channels,and these channelsto permit the full-est use and freecultivation of theland must be re-movable. To meetthese conditionsand to bring abouta more economicaluse of both landand water, the useof metal pipe andcanvas hose in theirrigation of fieldcrops, has beenquite widely adopt-ed in the region re-ferred to. Fields of alfalfa irrigated with pipe and hose are usually laid out insuch manner that from 5 to 10 acres may be served from each stand,depending, of course, upon the size and shape of the tract. Thesecem
Preparing land for irrigation and methods of applying water . y the useof lined channels,and these channelsto permit the full-est use and freecultivation of theland must be re-movable. To meetthese conditionsand to bring abouta more economicaluse of both landand water, the useof metal pipe andcanvas hose in theirrigation of fieldcrops, has beenquite widely adopt-ed in the region re-ferred to. Fields of alfalfa irrigated with pipe and hose are usually laid out insuch manner that from 5 to 10 acres may be served from each stand,depending, of course, upon the size and shape of the tract. Thesecement stands consist of two or three sections of 8 or 10 inch cementpipe placed in a vertical position and connected with the undergrounddistributary pipe by a T joint (fig. 21). They are placed at intervalsalong the highest side of a field and serve as outlets from which thepiped water is taken metal and canvas pipes. Various combinations of galvanized iron pipe and canvas hose areused. Some irrigators prefer to use all canvas hose with only a short. Fig. 24.—Details of construction of 8-inch cement stand. Method ofclosing discharge is described on page 55. 52 length of metal pipe (PI. IV, fig. 2). Others use nearly all metalpipe and only a short piece of canvas hose to join the metal pipeto the stands. Often even this small amount of canvas hose is dis-pensed with. Still others have adopted the metal pipe to convey thewater from the stand to the section of the field to be irrigated anduse the hose simply to distribute it. The best results seem to beobtained through the use of this last-mentioned combination. Figure C7 to 25 shows part of a field of alfalfa irrigated in this manner, which willillustrate the common method of handling- the conduits when in use. i I
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