\\\\(\ extbf{Concept:}\\\\) a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water.\\\\(\\bullet\\\\) When the soil of his field is too acidic, it is to be treated with bases like slaked lime(calcium hydroxide) or quicklime(calcium oxide).The organic matters are added to the soil if the soil of his field is too basic. Organic matter releases acids that neutralize the basic nature of the soil.