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10 cards from this deck
7
Acidity/alkalinity of soil (0-14 scale)
Changes colour based on pH levels
Liquid passing through filter paper
Avoids affecting natural pH of soil sample
Neutral soil (pH 7)
Moderately acidic soil (pH 5-6)
Very acidic soil (pH 1-4)
Alkaline soil (pH 8-14)
Removes solid particles interfering with colour observation
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