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 ...

What pH is, why it's important, and how to adjust it If you notice your plant's health is declining, one of the reasons could be that the soil pH is out of balance. The importance of soil pH cannot be ...

The pH of a soil refers to its acidity or alkalinity and is a vital factor in plant growth. It's easy to measure and is usually listed numerically on a scale of one to 14. Acid soils have a pH of ...