 |
|
|
| F-F or F-F ? |
| Author: Michael Whited Created on: 7/5/2012 MessageID: 1515 |
| NASIS (NRCS soil database) require population of a data element termed “Frost-free days.” NASIS data dictionary calls for the 32 F degree threshold to be used when populating the db. Both a 28 and 32 degree F threshold has been used in the ‘literature’ and the terms frost-free and freeze-free seem to have been used interchangeably by some. NRCS Wetland Policy and COE Wetland policy define the estimated “Growing Season” for wetland hydrology using the 28 F threshold. NRCS National Climate Center uses 28 F threshold for “freeze” and 32 F threshold for “frost”. What to do? Currently we are entering Frost-free in NASIS based on 32F threshold, this is in conflict with NRCS’s climate experts (National Water & Climate Center) and the NASIS entry is not used / in synch with the 28F threshold used by Field Offices for Growing Season. I have tried to point out this issue and ask for clarification or a re-think. Never got any bites. |
Total messages in this thread... 3 Freeze Free Period vs Frost Free DaysF-F or F-F ? (current) Freeze Free Period vs Frost Free Days |
 Return to top of page USDA-NRCS Soils SiteThis site provided as a service of Virginia Polytechnic Institute and State University |