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Under What Soil Conditions Do You Think a Farmer Would Treat the Soil of His Fields with Quicklime (Calcium Oxide), Or Slaked Lime (Calcium Hydroxide) Or Chalk (Calcium Carbonate)? - Concept of Ph Scale

Under what soil conditions do you think a farmer would treat the soil of his fields with quicklime (calcium oxide), or slaked lime (calcium hydroxide) or chalk (calcium carbonate)?

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Calcium oxide, calcium hydroxide and calcium carbonate are all bases (pH > 7), and hence, they must be used only in cases where the soil is too acidic (pH < 7). They help in neutralising the acidity of the soil and assist in bringing the pH closer to 7. 

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