Gary McCarthy
Chumono
Interesting article and pH chart.
How Sweet is Your Soil? - Marin Rose Society
The term pH stands for the potential Hydrogen and is measured on a scale between 0 and 14. What’s being measured is the concentration of hydrogen (H) ions — the more hydrogen ions there are, the more acid the thing being measured is. Things having a pH below 7 are considered acid, while those...
www.marinrose.org
