An expression of the intensity of the basic or acidic condition of a liquid or of soil; the logarithmic scale ranges from 0 to 14, where 0 is the most acid, 7 is neutral, and above 7 is alkaline. Natural waters usually have a pH between 6.5 and 8.5. Plants have differing tolerances for acidity and alkalinity.
Selected pH links:
|© 1997-2006 Healthboard.com. Healthboard.com is a purely informational website, and should not be used as a substitute for professional legal, medical or technical advice.|