NB_430_23_6 - NB 430-23-6 SOI – Comment Period for TN 430-SS-2, “Soil Color Contrast”
NB 430-23-6 SOI – Comment Period for TN 430-SS-2, “Soil Color Contrast”
National Bulletin: 430-23-6 
Date: January 11, 2023 
Subject: SOI – Comment Period for TN 430-SS-2, “Soil Color Contrast” 


Action Required By:   February 24, 2023  
 
Purpose.   This national bulletin solicits reviews and comments on proposed changes to TN 430-SS-2, “Soil Color Contrast.”    
 
Expiration Date.   March 31, 2023  
 
Background.  

TN 430-SS-2 provides guidelines to help soil scientists assign soil color contrast terms consistently. In general, updates were made to the technical note to explain color contrast when neutral or gley colors are present. 

Revisions to TN 430-SS-2 include:

  •  Updating the “Purpose” section to include publication date
  •  Updating the “Introduction” section to clarify minor color components and soil color contrast classes
  • Changing the title of the “Procedure for determining the difference between hues” section to “Procedure for determining the difference between hues and chromas” section
  •  Adding information about the National Cooperative Soil Survey, neutral colors, and gley colors in the “Procedure for determining the difference between hues and chromas” section
  • Adding the Gley 1 pages of the Munsell Soil Color Chart in the “Procedure for determining the difference between hues and chromas” section
  • Editing the “Tabular keys for soil color contrast determination using the Munsell color notation” section to be 508 compliant
  • Updating the “References” section to include current references
  
 
Explanation.  

Please review the proposed changes to TN 430-SS-2 on the Box site at: Proposed Changes (Technical Note).  Email comments and edits to Debbie Surabian, National Leader for Standards, at Debbie.Surabian@usda.gov by February 24, 2023.

You may compare the proposed changes with the current wording of TN 430-SS-2, which is on eDirectives at: https://directives.sc.egov.usda.gov/.

   
 
Contact.  

Direct questions to Debbie Surabian, National Leader for Standards, at Debbie.Surabian@usda.gov.

    
 
 

 /s/

LUIS TUPAS
Deputy Chief for Soil Science and Resource Assessment
  
  

 
 
   
[NB_430_23_6 - ]