H_430_620 - Parts 600 - 620
Parts 600 - 620

  Table of Contents

             Part 600 – Introduction 

Subpart A -General Information

600.0  The Mission of the Soil Science Division, Natural Resources Conservation Service

600.1  Purpose

600.2  National Cooperative Soil Survey (NCSS) Standards

600.3  Principal References and Their Maintenance

600.4  Conventions and Terminology

600.5  Standards of the National Cooperative Soil Survey 

Subpart B - Exhibits

600.10  List of Technical References

600.11  Tracking Flowchart for NSSH Amendments (After Figure 503-D2: Workflow for National-Level Directives Approval in Title 120, National Directives Management Manual, 2017)

Part 601 – National Cooperative Soil Survey Organization 

Subpart A -General Information

601.0  Definition

601.1  NRCS Organization and Responsibilities

Subpart B - Appendix

601.10 Primary Federal Partners

Part 602 – Conferences of the National Cooperative Soil Survey

Subpart A -General Information

602.0 Definition

Subpart B Exhibits

602.10  Bylaws of the National Cooperative Soil Survey Conference

602.11  Bylaws of the Western Regional Cooperative Soil Survey Conference (Updated June 2012)

602.12  Bylaws of the Northeast Cooperative Soil Survey Conference (Revised June 2020)

602.13  Bylaws of the North Central Regional Soil Survey Conference (Revised June 7, 2012)

602.14  Bylaws of the Southern Regional Cooperative Soil Survey Conference

602.15  Conducting NCSS Conferences

Part 606 – Working Agreements 

Subpart A – General Information

606.0  Definition

606.1  Policy and Responsibilities

Subpart B – Exhibits

606.10 Template for an MLRA Regionwide Memorandum of Understanding

Part 607 – Initial Survey Preparation 

Subpart A -General Information

607.0  Purpose

607.1  Policy and Responsibilities

607.2 Preliminary Survey Activities

Subpart B - Exhibits

607.10 Reference Materials for Soil Surveys

607.11 Example of a Procedure for Geodatabase Development, File Naming, Archiving, and Quality Assurane

Part 608 – Program Management

Subpart A -General Information

608.0 Definition and Purpose

608.1  Responsibilities and Organization

608.2  Soil Survey Area Designation 

608.3  Areas of Limited Access, Denied Access Areas, and Areas Not Completed

608.4  Determining Workloads

608.5  Priorities for Soil Survey Activities

608.6 Planning Workflow

608.7 Goals and Progress

608.8  Developing Other Schedules for Soil Survey Operations

608.9  Status Maps 

Subpart B - Exhibits

608.10 Long-Range Plan for Initial Soil Surveys

Part 609 – Quality Control, Quality Assurance, and Soil Correlation

Subpart A -General Information

 609.0  Definition and Purpose of Quality Control and Quality Assurance

 609.1  Policy and Responsibilities for Quality Control and Quality Assurance

 609.2  Soil Correlation

 609.3  Seamless Soil Survey

 609.4  Quality Control Reviews

 609.5  Quality Assurance Reviews

 609.6  Field Assistance Visits

 609.7  Final Soil Survey Field Activities for Initial Soil Survey Projects

 609.8  General Soil Maps, Index Maps, and Location Maps

Subpart B - Exhibits

Part 610 – Updating Soil Surveys

Subpart A -General Information

610.0 Definition and Purpose            

610.1 Policy and Responsibilities

610.2 Inventory and Assessment

610.3 Update Strategies

610.4 Project Plan

610.5 Prioritizing and Ranking

610.6 Long-Range Plan

610.7 Annual Plan of Operation (APO)

610.8 Certification of Soils Data

610.9 Publication of Soils Data 

Subpart B - Exhibits

610.10 Agency Resources Concerns

610.11 Information Items for the Inventory Assessment

610.12 Resources for the Inventory and Assessment

610.13 Sample Project Evaluation Worksheet

610.14 Project Plan Checklist

610.15 Example of a Project Evaluation Ranking Procedure  

Part 614 – Applying Soil Taxonomy

Subpart A – General Information

 614.0  Definition and Purpose

 614.1  Policy and Responsibilities

 614.2  National Soil Classification System

 614.3  Use of the National Soil Classification System in Soil Surveys

 614.4  Soil Taxonomy Committees, Work Groups, and Referees

 614.5  Procedures for Amending Soil Taxonomy

 614.6  The Soil Series

Subpart B – Exhibits

 614.10 Flow Chart of Amendment Process

614.11 Example of an Official Series Description in HTML

614.12 Explanation and Content of a Soil Series Description

614.13 Rounding Numbers from Laboratory Data

614.14 Significant Digits for Soil Property or Quality Measurements Used as Criteria in Soil Taxonomy 

Part 617 – Soil Survey Interpretations 

Subpart A – General Information 

617.0 Purpose

617.1 Responsibilities

617.2 Interpretations for Map Unit Components and Map Units

617.3 Developing and Maintaining Interpretation Guides and Ratings

617.4 Reviewing and Implementing Soil Interpretative Technologies

617.5 The National Soil Information System

617.6 Presenting Soil Interpretations

617.7 Updating Soil Interpretations

617.8 Coordinating Soil Survey Interpretations

617.9 Writing Soil Interpretation Criteria

617.10 Documenting Soil Interpretation Criteria

617.11 Requirements for Naming Reports and Interpretations

617.12 Interpretation Overrides

Subpart B – Exhibits

617.20 Example of Descriptions for Documenting Interpretations

Part 618 – Soil Properties and Qualities

Subpart A – General Information

618.0  Definition and Purpose

618.1  Responsibilities

618.2  Collecting, Testing, and Populating Soil Property Data

618.3  Soil Properties and Soil Qualities

618.4  Albedo, Dry

618.5  Artifacts in the Soil

618.6  Available Water Capacity

618.7  Bulk Density, One-Third Bar

618.8  Bulk Density, Oven Dry

618.9  Bulk Density, Satiated

618.10  Calcium Carbonate Equivalent

618.11  Cation-Exchange Capacity NH4OAc pH 7

618.12  Climatic Setting

618.13  Corrosion

618.14  Crop Name and Yield

618.15  Diagnostic Horizon Feature – Depth to Bottom

618.16  Diagnostic Horizon Feature – Depth to Top

618.17  Diagnostic Horizon Feature – Kind

618.18  Drainage Class

            618.19  Effective Cation-Exchange Capacity

618.20  Electrical Conductivity

618.21  Electrical Conductivity 1:5 (volume)

618.22  Elevation

618.23  Engineering Classification

618.24  Erosion Accelerated, Kind

618.25  Erosion Class

618.26  Excavation Difficulty Classes

618.27  Exchangeable Sodium

618.28  Extractable Acidity

618.29  Extractable Aluminum

618.30  Flooding Frequency Class, Duration Class, and Month

618.31  Fragments in the Soil

618.32  Free Iron Oxides

618.33  Frost Action, Potential

618.34  Gypsum

618.35  Horizon Depth to Bottom

618.36  Horizon Depth to Top

618.37  Horizon Designation

618.38  Horizon Thickness

618.39  Hydrologic Group

618.40  Landscape, Landform, Microfeature, Anthroscape, Anthropogenic Landform, and Anthropogenic Microfeature

618.41  Linear Extensibility Percent

618.42  Liquid Limit

618.43  Organic Matter

618.44  Parent Material, Kind, Modifier, and Origin

618.45  Particle Density

618.46  Particle Size

618.47  Percent Passing Sieves

618.48  Plasticity Index

618.49  Ponding Depth, Duration Class, Frequency Class, and Month

618.50  Pores

618.51  Reaction, Soil (pH)

618.52  Restriction Kind, Depth, Thickness, and Hardness

618.53  Saturated Hydraulic Conductivity

618.54  Slope Aspect

618.55  Slope Gradient

618.56  Slope Length, USLE

618.57  Sodium Adsorption Ratio

618.58  Soil Erodibility Factors, USLE, RUSLE2

618.59  Soil Erodibility Factors for WEPP

618.60  Soil Moisture Status

618.61  Soil Slippage Potential

618.62  Soil Temperature

618.63  Subsidence, Initial and Total

618.64  Sum of Bases

618.65  Surface Fragments

618.66  T Factor

618.67  Taxonomic Family Temperature Class

618.68  Taxonomic Moisture Class

618.69  Taxonomic Moisture Subclass (Subclasses of Soil Moisture Regimes)

618.70  Taxonomic Temperature Regime (Soil Temperature Regimes)

618.71  Texture Class, Texture Modifier, and Terms Used in Lieu of Texture

618.72  Water, One-Tenth Bar

618.73  Water, One-Third Bar

618.74  Water, 15 Bar

618.75  Water, Satiated

618.76  Water Temperature

618.77  Wind Erodibility Group and Index

Subpart B - Exhibits

618.80  Guides for Estimating Risk of Corrosion Potential for Uncoated Steel 

618.81  Guide for Estimating Risk of Corrosion Potential for Concrete

618.82  Crop Names and Units of Measure

618.83  Classification of Soils and Soil-Aggregate Mixtures for the AASHTO System

618.84  Potential Frost Action 

618.85  Distribution of Design Freezing Index Values in the Continental United States 

618.86  Estimating LL and PI from Percent and Type of Clay 

618.87  Texture Triangle and Particle-Size Limits of AASHTO, USDA, and Unified Classification Systems 

618.88  Guide for Estimating Ksat from Soil Properties  

618.89  Guide to Estimating Water Movement Through Bedrock for Layers Designated as R and Cr  

618.90  Rock Fragment Modifier of Texture  

618.91  Soil Erodibility Nomograph  

618.92  Kw Value Associated With Various Fragment Contents  

618.93  General Guidelines for Assigning Soil Loss Tolerance “T”  

618.94  Texture Class, Texture Modifier, and Terms Used in Lieu of Texture 

618.95  Wind Erodibility Groups (WEG) and Index  

618.96  Key Landforms and Their Susceptibility to Slippage 

618.97  Example Worksheets for Soil Moisture State by Month and Depth


618.98  NASIS Calculation for Estimating AASHTO Group Index


618.99  NASIS Calculation for Estimating Cation-Exchange Capacity


618.100  NASIS Calculation for Estimating Effective Cation-Exchange Capacity


618.101  NASIS Calculation for Estimating Extractable Acidity


618.102  NASIS Calculation for Estimating Liquid Limit and Plasticity Index


618.103  NASIS Calculation for Estimating Particle Size


618.104  NASIS Calculation for Estimating Rock Fragments and Percent Passing Sieves


618.105  NASIS Calculation for Estimating Water Content Data

618.106  References








[H_430_620 - 1st Ed., Amend. 39, May 2021 - ]