Soil Physical and Chemical Properties | NRCS New Jersey
Jan 30, 2014· Soil Reaction (pH) By definition, "pH" is a measure of the active hydrogen ion (H+) concentration. It is an indication of the acidity or alkalinity of a soil, and also known as "soil reaction". The pH scale ranges from 0 to 14, with values below 7.0 acidic, and values above 7.0 alkaline.