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Published on Feb 8, 2013
Demonstration by Ron Patterson, USU Extension, Carbon Country. Just so others will not be confused by beliefs and assumptions, here is the link to the research I sent: http://www.treedictionary.com/DICT200.... Empirical data from research in the last century indicates that for most tree species that grow in Utah, roots stop growing when soil temperatures drop below 40o F and start up when soil temperatures rise above 40o F.