SOIL SURVEY

Example 4 .Example 5 .A manager wishes to assess the impact of a major development o nthe soils of an area . It will likely be necessary to gain a thoroug hunderstanding of not only the soils in the area, but a knowledge oftheir interrelationships . In this case the user should read all ofPart I in order to familiarize himself with the background natura lresource information . Then by consulting the black and white mapshe can record the map units which occur in the area to be examined .He should then systematically read the appropriate generalize d(Part III) and/or detailed (Appendix E) map unit descriptions togain a concept of the map unit and its variability . If the chemica land physical data are required such analyses are presented for eac htype pedon in Appendices A and B (The analyses apply to th ecentral concept of the map unit but may be inappropriate for ma pareas that are near the limits of the concept) . Now by examining th eappropriate guidelines for interpretations and perhaps by developin ghis own guidelines, the analyst can assess the limitations (or suitabilities)of given soils (or land areas) for specific proposed uses .The analytical data is thought to be representative of the map areas ,but the proposed limitations are, to a considerable extent, valuejudgments and any improvements are welcomed and indeed urged .A manager wishes to assess a relatively extensive area for primitiv ecampsites . The simplest approach would be to delimit the are aunder study on the black and white maps and then, by referring t oTable 67, color these areas with slight limitations green, moderat elimitations yellow, severe limitations orange and very sever elimitations red . As with Example 3, the reader should consul tTable 59 and assess whether the background assumptions lead t othe limitations that would be anticipated in the users experience .Engineering data presented in Appendix B can be used to supplemen tthe background information on limitations .A couple of closing comments are warranted . It is our expectation that mostof the basic data used to prepare the soils maps will be definitive . The interpretation sin Part IV should, and must, be continually reviewed so that they reflect the curren tconcepts and values governing land use . The main value of this report is that itallows an experienced user to transfer his experience from an area with which he i sfamiliar to an area where he has little experience . This is accomplished by th euser examining the map units in the area for which he has familiarity and extrapolatin gthe responses to unfamiliar areas by associating the responses with appropriate mapunits .-vii-