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9 <br /> detailed soil map units <br /> The map units on the detailed soil maps at the back of This survey includes miscellaneous the or nareas <br /> this survey represent the soils in the survey area. The <br /> have little or no soil material and support <br /> map unit descriptions in this section, along with the soil vegetation. Rock outcrop is an example. Miscellaneous <br /> maps, can be used to determine the suitability and areas are shown on the soil maps. Some that are too <br /> potential of a soil for specific uses.They also can be small to be shown are identified by a special symbol on <br /> used to plan the management needed for those uses. the soil maps. age and <br /> More information on each map unit, or scil, is given each give Other tables (see -Summary of tablees' )f <br /> under "Use and management of the soils." P <br /> Each map unit on the detailed soil maps represents an give properties of the soils and the limitations, <br /> area on the landscape and consists of one or more soils deffiiines1Umany of the terms used in describ ngthelsoils. <br /> for which the unit is named. <br /> A symbol identifying the soil precedes the map unit <br /> name in the soil descriptions. Each description includes soil descriptions <br /> general facts about the soil and gives the principal <br /> hazards and limitations to be considered in planning for 1—Alvarado very cobbly sandy loam, 2 to 5 <br /> specific uses. percent slopes.This is a deep, somewhat poorly <br /> Soils that have profiles that are almost alike make up drained soil on fans and low terraces. It formed in <br /> a soil series. Except for differences in texture of the alluvium and glacial outwash. Elevation is 7,700 to 6,400 <br /> surface layer or of the underlying material, all the soils of feet. The average annual precipitation is 14 to 18 inches, <br /> series have major horizons that are similar in the average annual air temperature is 40 to 44 degrees <br /> ;reposition, thickness, and arrangement. F, and the frost-free season is 55 to 75 days. <br /> Soils of one series can differ in texture of the surface Typically, the surface layer is very cobbly sandy loam <br /> layer or of the underlying material. They also can differ in 12 inches thick. The upper 7 inches is brown, and the <br /> slope, stoniness, salinity, wetness, degree of erosion, lower part is dark brown. The subsoil is mottled, brown <br /> and other characteristics that affect their use. On the very cobbly sandy clay loam 29 inches thick. The <br /> basis of such differences, a soil series is divided into soil substratum is mottled, light brown very cobbly sandy <br /> phases. Most of the areas shown on the detailed soil loam to a depth of 60 inches or more. The soli is slightly <br /> maps are phases of soil series. The name of a soil acid to a depth of 12 inches, neutral to a depth of 41 <br /> phase commonly indicates a feature that affects use or inches, and mildly alkaline below that depth. <br /> management. For example, Norriston very cobbly sandy Included with this soil in mapping are areas of <br /> loam, 2 to 6 percent slopes, is one of several phases in Norriston very cobbly sandy loam along low ridges. <br /> the Norriston series. These included areas make up about 15 percent of the <br /> Some map units are made up of two or more major map unit. <br /> soils. These map units are called soil complexes. Permeability of this Alvarado soil is moderate, and the <br /> A soil complex consists of two or more soils in such available water capacity is tow. The effective rooting <br /> an intricate pattern or in such small areas that they depth is 60 inches or more. Surface runoff is slow, and <br /> cannot be shown separately on the soil maps. The the hazard of erosion is slight. In most years a seasonal <br /> 9 <br /> pattern and proportion of the soils are somewhat similar high water table is at a depth of 3 to 4 feet between <br /> in all areas. Granile-Peeier-complex, 25 to 50 percent March 1 and June 30 and is at a depth of more than 4 <br /> slopes, is an example. feet or absent the rest of the year. <br /> Most map units include small scattered areas of soils This soil is used for irrigated hay, irrigated pasture, and <br /> other than those for which the map unit is named. Some <br /> of these included soils have properties that differ range. Mixtures of brome, orchardgrass, intermediate <br /> substantially from those of the major soil or soils. Such wheatgrass, and timothy are commonly grown. Most <br /> differences could significantly affect use and areas are used for irrigated pasture because the very <br /> management of the soils in the map unit. The included cobbly plow layer limits the use of machinery. <br /> Where this soil is irrigated, the proper use :)f water <br /> _ soils are identified in each map unit des;ription. Some and maintenance of soil fertility are the main <br /> small areas of strongly contrasting soils are identified by management concerns. Flooding from contour cinches is <br /> especial symbol on the soil maps. <br />