Hi -
You might be thinking of Sexton's paper....see attached. Although his work was done in Missouri - where the ground is a lot less likely to ever freeze!
Jessica
--- vernalpool@yahoogroups.com wrote:
>
> Matt:
>
> Do I remember correctly some research on ground temperature reaching
> 41 degrees at some given depth as a trigger?
>
> Shep Evans
>
--- end of quote ---
[Non-text portions of this message have been removed]
__._,_.___
.
__,_._,___
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.