Phosphorus is never readily soluble in the soil but is most available in soil with a pH range centered around 6.5. Extremely and strongly acid soils (pH 4.0-5.0) can have high concentrations of ...

Davis. “Most products typically have a pH range of 6 to 6.5,” she says. “Those formulated at 4.5 to 5.75 are closest to our skin’s pH.” It’s important to note that pH only applies to products ...

Each enzyme has an optimum pH but it also has a working range of pH values at which it will still work well. This depends on the type of enzyme. The enzyme pepsin breaks down proteins in the ...

The other defense against acid is fluoride. As the active ingredient in many toothpastes and rinses, topical fluoride lowers the susceptible pH of enamel from 5.5 to 4.5, meaning any acid must be ...