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2018 NCSS Regional Standards and Taxonomy Committee Proposals

The following proposals are presented for deliberation by the 2018 NCSS Regional Committees.

Standards

Soil Taxonomy

 

 




Flooding and ponding

What are the issues?

Issues with the delivery of Flooding and Ponding data have confused soil survey users for many years. The current NASIS data structure and guidance on data population, which requires the entry of annual inundation frequency class by month, has led to this confusion and inconsistent application since the inception of NASIS.

What is the fix?

Clarifying and expanding definitions for flooding, ponding, and continuous inundation within the NSSH, then implementing the subsequent changes in NASIS and the SSURGO data model.  Two proposals are presented here. Both proposals have already been routed through the senior regional soil scientists, database focus team, and the coastal zone mapping focus team.

What is the cost?

Funding for programmers will be needed to get the proposals implemented throughout all systems for Web Soil Survey delivery.
 


Anthropic Epipedons and Mollisols

What are the issues?

Currently epipedon diagnostic features are not keyed out in the NCSS classification system and are designed to identify characteristics that are mutually exclusive to one or another.   This is not the case with the Anthropic, Plaggen, and Mollic Epipedons, currently a soil can meet the criteria for all three epipedons in the 12ed of the keys to Taxonomy.  Previous editions of the keys, 8-10th, the Mollic and Anthropic epipedons were distinguished by phosphorus criteria.   Is it the intention for taxonomy to only recognize one diagnostic surface horizon or can a soil have multiple epipedons?  Mollisols are the only order that has specific epipedon criteria requirements making this a significant issue.

What is the fix?

Three proposals have been offered.

What is the cost?