Soil pH meter

Soil pH meter

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Credit: SCIENCE PHOTO LIBRARY

Caption: Soil pH meter. This is a device for measuring how acid or alkaline the soil is. The optimum range for most plants is between pH 5.5 and pH 7 (weakly acidic to neutral), however there are plants that grow best in alkaline soils.

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Keywords: acid, acidity, alkaline, alkalinity, balance, biological, biology, botanical, botany, chemistry, domestic, earth, familiar, garden, gardening, ground, home, horticulture, household, hydrogen ion concentration, in situ, measurement, measuring, meter, natural, nature, no-one, nobody, ph, probe, school science, science education, soil, stick, system, test, testing

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