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Technical Information
pH VALUE AND LIME REQUIREMENTS
See the table of ALA lime recommendations or the ALA lime calculator available from info@qpa.org.
The degree of soil acidity or alkalinity is measured by what is known as the pH scale. A figure of pH 7 represents a materials relationship to the neutral position of pure water at pH 7.0. Figures below 7 indicate increasing acidity and above 7 increasing alkalinity.
The optimum for general cropping is between pH 6.8 and 7.0. For permanent grassland the optimum pH is slightly lower.
There are several methods of testing the pH of soils and with some knowledge of the relationship between pH and lime requirement for various soil types the pH can be used as a guide to the lime requirement. |
NEXT > ALA Lime Application Recommendations
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The advisory booklet 'Agricultural Lime, the natural solution' is available from the ALA. Click HERE to order a copy by email. |