Solution:
The above statement is true.The substance farmer adds when the soil is acidic in nature calcium oxide, calcium hydroxide and calcium carbonate. Farmers add calcium oxide ), calcium hydroxide , and carbonate () whenever the soil is acidic. The soil which contains chlorine and sulphide ions, due to which the soil becomes acidic, to neutralise acidic soil quicklime or slaked lime is added. When acid reacts with the base, it produces salt and water. The mineral salt produced will make the soil more fertile.
