Source  - Source is a term meaning the position of origin of a substance.  Sink is the position where the substance finally is used or incorporated and cannot move further.  A nurse log is the source for elements and nutrients for the soil.  However the elements were part of the sink when the tree maintained a symplast.


Dictionary MAIN PAGE
Text & Graphics Copyright © 2007 Keslick & Son Modern Arboriculture
Please report web site problems, comments and words of interest, not found.
Contact