Rangeland Ecology & Management
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Water Potential
The thermodynamic state of the water in a cell, organism, or soil, equal to the difference in free energy per unit volume between matrically bound, pressurized or osmotically constrained water and that of pure water.
Source
Society for Range Management. 1998. Glossary of terms used in range management, fourth edition. Edited by the Glossary Update Task Group, Thomas E. Bedell, Chairman. Used with permission.