. Soil physics and management. Fig. 11&Fig. 117.—Desert lands and Homestead, HuntlejProject, Montana. CU. S. Reclamation Service.)Fig. lis.—Wheat field, Minidoka Project, Idaho. Yield 60 bushels per acre. ^U. .S. Reclamation .Service.) it to a uniform slope so that water will spread over it uniformly.(Fig. 118). Character of Water Used for Irrigation.—In humid regions 262 SOIL rUYSlC^ AND MANAGEMEXT the wsror o: si^sjins oarne* but iitrle SvUuble maierial, but iu aridsuui seiuisiTid r^ioais, whero the gry?at nec^sssity for irrigaticoieii$t$s both $oil and w^ter may .xaitaiu alkali in considera
. Soil physics and management. Fig. 11&Fig. 117.—Desert lands and Homestead, HuntlejProject, Montana. CU. S. Reclamation Service.)Fig. lis.—Wheat field, Minidoka Project, Idaho. Yield 60 bushels per acre. ^U. .S. Reclamation .Service.) it to a uniform slope so that water will spread over it uniformly.(Fig. 118). Character of Water Used for Irrigation.—In humid regions 262 SOIL rUYSlC^ AND MANAGEMEXT the wsror o: si^sjins oarne* but iitrle SvUuble maierial, but iu aridsuui seiuisiTid r^ioais, whero the gry?at nec^sssity for irrigaticoieii$t$s both $oil and w^ter may .xaitaiu alkali in considerable abun-dance. While the e:xee!5s: of alkali in irrigated lands is due usuallytv> The salts in the soil, yet it is in many eas*s? due in part, and some-timets vhoUy, to the salinity of the water which is Knng nsevl forirrigatiiMi. The salrs thus carried accumulate in the soil, pKv-ducing \«^y injurious n>sults- Forty grains of salts per gallon isusually assigned as the limit for irrigation xraters. This, howe
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1917
