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==Soil or media pH==
==Soil or media pH==
−Soil pH is a measure of the hydrogen ion concentration of a mixture of soil (or engineered media) and water.
+Soil pH is a measure of the hydrogen ion concentration of a mixture of soil (or [[filter media]] or [[green roof media]]) and water.
Neutral soil has a pH value of 7.0. An acidic soil has a pH less than 7 and a basic soil has a pH greater than 7.
Neutral soil has a pH value of 7.0. An acidic soil has a pH less than 7 and a basic soil has a pH greater than 7.