If there are equal hydrogen (H) ions and hydroxyls (OH), the pH is 7, or neutral,” Ferrie explains. Ammoniacal nitrogen in the soil. In certain cases ammonium (NH4) can be converted back to ...

The relative ability of soils to store one particular group of nutrients, the cations, is referred to as cation exchange capacity or CEC. Soils are composed of a mixture of sand, silt, clay and ...