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 bulk of soil is made up of a mixture of organic matter ... and is usually listed numerically on a scale of one to 14. Acid soils have a pH of below seven, neutral is pH7 and alkaline is ...
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