USDAFSUnited States Department of Agriculture Forest Service
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Grading of Northern Hardwood Logs (Benson and Wollin 1941) became the first attempt by the USDAFS to develop a standardized system for grading hardwood logs, based on the resulting lumber grade yields.
24) and became the basis for ultimately implementing USDAFS log grades.
The NHHMA took a clear-cuttings approach similar to the USDAFS grades; however, it was much less elaborate.
Herrick considered his log grades an adaptation of the USDAFS grades being developed; however, they were much less complex.
The sampling program documented existing and pre-drought mussel assemblages on USDAFS properties throughout the SNF.
Some species collected in the present study are notable either because of the species status as a TPWD listed "Threatened Species", the species status as a USDAFS listed "Sensitive Species" for Region 8 (i.e., the region encompassing the SNF), or their rarity in the previous six cited studies of the Sabine River watershed.
This species is currently listed as both a TPWD Threatened Species and a USDAFS Region 8 Sensitive Species.
declivis) is listed neither by the TPWD nor the USDAFS, however collection of this species warrants discussion.
An unpublished USDAFS report (Rast and Baumgras 1997) confirms the lack of use of the USDAFS hardwood log grades.
An obvious conclusion is that the development work on hardwood log grading and the ensuing research work using the USDAFS grades have not adequately addressed the needs of the hardwood industry.
USDAFS System versus Industry De Facto System: Ease of Use
The USDAFS system (Table 1) can require an assessment of all four faces of a log, which requires turning the log if the three visible faces are not all the same grade.