Soil pH or soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units. Soil pH is defined as the negative logarithm of the hydrogen ion concentration. The pH scale ...

The more concentrated the solution of an acid, the lower its pH will be. If the hydrogen ion concentration in a solution increases by a factor of 10, the pH of the solution decreases by 1 unit.

Acidic and alkaline solutions can conduct electricity because they have ions that are free to carry charge. Look at the formulae of these acids. They all contain H + ions.

For instance, potassium can be replaced by cations such as calcium or hydrogen, and vice versa. The total number of cations a soil can ... For instance, soils having a high CEC and high buffer ...