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National Soil Information System User DocumentsPart 600 - INTRODUCTIONCONTENTSPART TITLE PAGE600.00 The Mission of the Soil Survey Division,Natural Resources Conservation Service..............................................................................600-1600.01 Purpose................................................................................................................................600-1600.02 National Cooperative Soil Survey (NCSS) Standards..........................................................600-1600.03 Principal References and Their Maintenance........................................................................600-1(a) The Soil Survey Manual...............................................................................................600-1(b) Soil Taxonomy and the Keys to Soil Taxonomy.............................................................600-1(c) The National Soil Survey Handbook............................................................................600-1(d) User Manuals...............................................................................................................600-2(e) Guides..........................................................................................................................600-2Exhibit 600-1 List of Technical References......................................................................................600-3(430-VI-NSSH, 2002) 1Part 600 - INTRODUCTION600.00 The Mission of the Soil SurveyDivision, Natural Resources Conservation Service.Provide leadership and service to produce and deliver scientifically-based soil information to help society to understand, value, and wisely manage global resources.600.01 Purpose.The National Soil Survey Handbook and other technical and procedural references provide the standards, guidelines, definitions, policy, responsibilities, and procedures for conducting the National Cooperative Soil Survey in the United States.600.02 National Cooperative Soil Survey (NCSS) Standards.NCSS standards are common or shared procedures that enhance technology transfer, data sharing, and communications among soil survey participants.NCSS standards apply to various soil survey functions. The many references listed in Exhibit 600-1 contain standards. 600.03 Principal References and Their Maintenance.The three principal publications guiding the NCSS are the Soil Survey Manual, Soil Taxonomy,and the National Soil Survey Handbook. Exhibit 600-1 is a list of other technical references that are important in gathering and applying soil knowledge. The following paragraphs describe how these publications are revised and how they apply to the NCSS in the United States.(a) The Soil Survey Manual.The purpose of the Soil Survey Manual is to provide the major principles and concepts for making and using soil surveys and the standards and conventions for describing soils. The manual is intended primarily for use by soil scientists engaged in making and interpreting soil surveys. It is also the basic reference for soil survey users whodesire to learn the scientific methods that form the basis for soil surveys. It discusses general procedures to illustrate and explain the principles and concepts, but the National Soil Survey Handbook presents current operational procedures of the NRCS in more detail.Amendments may be issued to the Soil Survey Manual as NRCS directives. Proposals to the manual may originate from any interested individual or group participating in the NCSS or from staffs of foreign soil survey organizations. The originating group or author forwards the proposal to the National Leader for Soil Classification and Standards.(b) Soil Taxonomy and the Keys to Soil Taxonomy.Agricultural Handbook 436, second edition Soil Taxonomy: A Basic System of Soil Classification for Making and Interpreting Soil Surveys (1999), provides the common base for the organization of knowledge about soils and the standards for their classification. The Keys to Soil Taxonomy, which is periodically revised, provides excerpts of Soil Taxonomy that can be readily used in the field and contains all the approved revisions and amendments to Soil Taxonomy. Procedures to amend Soil Taxonomy are outlined in part 614.(c) The National Soil Survey Handbook.The National Soil Survey Handbook provides guidelines, definitions, policy, responsibilities, and procedures for conducting the NRCS part of the NCSS. It contains information relative to planning and managing soil surveys, collecting and maintaining soil survey information, and distributing the information to users. The National Soil Survey Handbook provides specific information about the field activities, correlation, interpretation, publication, and dissemination of soil surveys of the NCSS.The National Soil Survey Center updates the National Soil Survey Handbook on a periodic basis. Any member of the NCSS may suggest changes or additions to the handbook. The originating author sends the proposed changes or additions, along with an explanation of and supportfor the need for the change or addition, to the National Soil Survey Center. The Center reviews (430-VI-NSSH, 2002)600-2 Part 600 - Introductionproposed changes, amendments, and additions at least annually. The Director, Soil Survey Division, issues the changes to holders of the National Soil Survey Handbook.The National Soil Survey Handbook is not to be amended or supplemented by offices other than the National Soil Survey Center.(d) User Manuals.User manuals contain procedures for conducting soil survey activities, such as those related to the electronic storage and display of soil information. Examples are the User Guides for the National SoilInformation System.(e) Guides.Guides provide special information and criteria for various functions, such as interpreting soils andupdating major land resource areas. Regional guides may be developed and used as needed to supplement national guides.(430-VI-NSSH, 1996)Part 600 - Introduction 600-3Exhibit 600-1 List of Technical References.Aerial-Photo Interpretation in Classifying and Mapping Soils, Agricultural Handbook 294,1973, USDA, SCS.Agricultural Handbook 18, Soil Survey Manual, 1993, USDA. http://soils.usda.gov/procedures/ssm/main.htmAgricultural Handbook 210, Land Capability Classification, 1973, USDA, SCS. Exhibit 622-2 NSSH. http://soils.usda.gov/procedures/handbook/content/622-ex2.htm#ex2Agricultural Handbook 296, Land Resource Regions and Major Land


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