Question

under what soil condition do you think a farmer would treat the soil of this field with calcium oxide or calcium hydroxide or chalk and why ???​

Answer 1

if the soil is acidic in nature which is not suitable for agriculture then the farmer would treat the soil with quick lime (calcium oxide) or slaked lime (calcium hydroxide) or chalk (calcium carbonate).

Answer 2

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Calcium oxide, calcium hydroxide and calcium carbonate all three are alkaline or basic in nature and these are used by farmers in their fields if they find the soil to be acidic in nature having more of chloride or sulphate ions to neutralize the effect of these ions and to increase the fertility of the soil.