Soils are classed by their pH value, which ranges from 6.5 to 7.5 (neutral). A pH of more than 7.5 is considered alkaline. Acidic soils have a pH of less than 6.5, while soils with a pH of less than 5.5 are termed severely acidic.
Soils are classed by their pH value, which ranges from 6.5 to 7.5 (neutral). A pH of more than 7.5 is considered alkaline. Acidic soils have a pH of less than 6.5, while soils with a pH of less than 5.5 are termed severely acidic.