What is Alkaline?

(Also alkalinity, alkaloid)

© Robert Dailey

Aug 19, 2006

Alkaline soil problems

Alkaline soil has a pH above 7.0. When soil registers between 7 and 8 on the pH scale, it is considered mildly alkaline. At 8.0 to 9.0, it is considered moderately alkaline, and above that, highly alkaline.

Alkalinity affects plants' ability to absorb phosphorus, iron and manganese. Generally areas with frequent droughts and desert areas have highly alkaline soil.

Soil alkalinity can be reduced by adding organic matter or sulphur. The opposite of alkaline is acidic.

Related Article: Desert Garden Soil Problems


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