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Appendix-114 <br /> Custom Soil Resource Report <br /> descriptions along with some characteristics of each.A few areas of minor <br /> components may not have been observed, and consequently they are not <br /> mentioned in the descriptions, especially where the pattern was so complex that it <br /> was impractical to make enough observations to identify all the soils and <br /> miscellaneous areas on the landscape. <br /> The presence of minor components in a map unit in no way diminishes the <br /> usefulness or accuracy of the data.The objective of mapping is not to delineate <br /> pure taxonomic classes but rather to separate the landscape into landforms or <br /> landform segments that have similar use and management requirements. The <br /> delineation of such segments on the map provides sufficient information for the <br /> development of resource plans. If intensive use of small areas is planned, however, <br /> onsite investigation is needed to define and locate the soils and miscellaneous <br /> areas. <br /> An identifying symbol precedes the map unit name in the map unit descriptions. <br /> Each description includes general facts about the unit and gives important soil <br /> properties and qualities. <br /> Soils that have profiles that are almost alike make up a soil series. Except for <br /> differences in texture of the surface layer, all the soils of a series have major <br /> horizons that are similar in composition, thickness, and arrangement. <br /> Soils of one series can differ in texture of the surface layer, slope, stoniness, <br /> salinity, degree of erosion, and other characteristics that affect their use. On the <br /> basis of such differences, a soil series is divided into soil phases. Most of the areas <br /> shown on the detailed soil maps are phases of soil series. The name of a soil phase <br /> commonly indicates a feature that affects use or management. For example,Alpha <br /> silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. <br /> Some map units are made up of two or more major soils or miscellaneous areas. <br /> These map units are complexes, associations, or undifferentiated groups. <br /> A complex consists of two or more soils or miscellaneous areas in such an intricate <br /> pattern or in such small areas that they cannot be shown separately on the maps. <br /> The pattern and proportion of the soils or miscellaneous areas are somewhat similar <br /> in all areas.Alpha-Beta complex, 0 to 6 percent slopes, is an example. <br /> An association is made up of two or more geographically associated soils or <br /> miscellaneous areas that are shown as one unit on the maps. Because of present <br /> or anticipated uses of the map units in the survey area, it was not considered <br /> practical or necessary to map the soils or miscellaneous areas separately.The <br /> pattern and relative proportion of the soils or miscellaneous areas are somewhat <br /> similar.Alpha-Beta association, 0 to 2 percent slopes, is an example. <br /> An undifferentiated group is made up of two or more soils or miscellaneous areas <br /> that could be mapped individually but are mapped as one unit because similar <br /> interpretations can be made for use and management. The pattern and proportion <br /> of the soils or miscellaneous areas in a mapped area are not uniform.An area can <br /> be made up of only one of the major soils or miscellaneous areas, or it can be made <br /> up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. <br /> Some surveys include miscellaneous areas. Such areas have little or no soil <br /> material and support little or no vegetation. Rock outcrop is an example. <br /> 12 <br />