A farmer in St. Elizabeth, Jamaica, tested the soil in his field before planting callaloo. The pH reading was 4.5. Which substance should the farmer add to the soil to improve crop growth?

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Question

A farmer in St. Elizabeth, Jamaica, tested the soil in his field before planting callaloo. The pH reading was 4.5. Which substance should the farmer add to the soil to improve crop growth?

Accepted Answer

Slaked lime — Award 1 mark for identifying that slaked lime (calcium hydroxide) is a base that neutralises acidic soil. A is incorrect — vinegar is an acid and would make the soil more acidic. C is incorrect — sulphuric acid would further lower the pH. D is incorrect — common salt is neutral and does not correct soil acidity.

Answer

Common salt

Answer

Vinegar

Answer

Sulphuric acid

Answer

Slaked lime

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