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Encyclopedia of Water Science. 615-617.
Matric potential, r, is a component of water potential, ?, but has different meanings in plant physiology vs. soil science. A rigorous definition of r requires a reference to principles of thermodynamics (both classical and irreversible thermodynamics). A rigorous treatment is beyond the scope of this brief overview. Readers interested in a detailed definition are advised to read the article of Ref. , but should be prepared to wade through 227 equations in a terse, 25-page article requiring a firm grasp of thermodynamics. Less detailed treatments can be found in Ref.  for soils and Ref.  for plant tissue.
Tyree, Melvin T. 2003. Matric potential. Encyclopedia of Water Science. 615-617.
Last updated on: November 21, 2008