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CONTENTS (.Continued) <br /> Land Resource <br /> Page. <br />Chapter I Introduction . 1 <br /> General description . 1 <br /> Land characteristics. 1 <br /> Soils 4 <br /> Drainage . 5 <br /> Irrigation history. 7 <br /> Irrigation methods. 8 <br /> Summary 8 <br />Chapter II Land classification and surveys. 11 <br /> Previous surveys . 11 <br /> Bureau of Reclamation. 11 <br /> 1926 classification 11 <br /> 1953 reclassification of class 5 lands. 11 <br /> 1955 reclassification of government-owned <br /> lands 11 <br /> 1955 Garfield pumping classif ication. 13 <br /> Soil Conservation Service. 13 <br /> Recent surveys . 13 <br /> Bureau of Reclamation. 13 <br /> 1972-77 Irrigation Management Services <br /> study 13 <br />• 1977 land resource inventory. 14 <br /> Agricultural Research Service. 14 <br />Chapter III Reed Wash study area 15 <br /> Description i5 <br /> Location . 15 <br /> Physiography . 15 <br /> Land classifications. 16 <br /> Soil Conservation Service soil survey. 16 <br /> Irrigation Management Services 19 <br /> 1977 land resource studies. 19 <br /> Soil characteristics 19 <br /> Typical soil prof files . 21 <br /> Salinity and trends. 21 <br /> Land inventory. 36 <br /> Reduced productivity areas.. 37 <br /> Shallow depths to shale. 38 <br /> High water tables . 38 <br /> Shallow depths to gravel 38 <br /> Isolated tracts. 38 <br /> Effects of canal and lateral lining 42 <br /> Irrigated areas. 42 <br /> Nonirrigated lands 42 <br />Chapter IV Summary. 43 <br /> <br />iii <br />