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Show RBC0NMAIS3AMCS SOIL AMD UK) CLASSIFICATION SURVH COLORADO R1TSR INDIAN HMXEVATIOH, ARIZOHA By V. 0. H*rp«r, Soil Scientist Agricultural Iconomic. Unit, Office of Indian Affairs IHTBODOCTION In April and May, 1940, a reconnaissance soil and land classification surrey eorcring that portion of the Colorado River Indian Reserration, Arisona, upon which irrigation development is contemplated was made in townships 8 and 9 Morth, Ranges 19, 20 and 21 Vest, Gil* and Salt River Meridian. During the spring of 1941 the surrey was extended to include lands in Townships k, 5, 6 and 7 Morth, Ranges 20, 21 and 22 West. Purpose of this surrey was to determine the Yarious classes of irrigable and non-irrigable lands in the area. This report is submitted to accompany land classification maps which hare been prepared to show results of the surrey, and to supplement the data given thereon. Conditions found to exist in the area are discussed briefly and descriptions are given of the factors upon which the Yarious land classifications were based. Of the two maps Included in this report, No. 1 covers Townships 7, 8 and 9, while No. 2 covers Townships 4, 5 and 6. The various bodies of land classification are outlined by fin* dotted lines, while a heavy dotted line is used to show vegetation boundaries. Seven colors are used to skew five land classifications, it having been found desirable to divide class Bo. 4 land into three sub-classifications. Symbols used on the maps to show factors entering into the classification of land are briefly described as follows! - 1 - |
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Original book: [State of Arizona, complainant v. State of California, Palo Verde Irrigation District, Coachella Valley County Water District, Metropolitan Water District of Southern California, City of Los Angeles, California, City of San Diego, California, and County of San Diego, California, defendants, United States of America, State of Nevada, State of New Mexico, State of Utah, interveners] : |