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If the pH of soil becomes very low, which substance can a farmer add to improve it?

Answer and explanation

Correct answer: Slaked lime

The governing concept is neutralisation and pH correction. A very low pH indicates that the soil is strongly acidic. Slaked lime, calcium hydroxide, is a basic substance; when added in a suitable amount, it reacts with excess acidity and raises the soil pH toward a more suitable range. Therefore option A is correct. Lemon juice, vinegar, and tamarind water are acidic and would intensify the problem.

Related tags

Soil PhSlaked LimeNeutralisationAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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