Question

Q1what should be added in the soil when it is (i) too acidic (ii) too basic?​

Answer 1

when soil id too (¡) acidic we should add liming the soil, or adding basic materials to neutralize the acid present. 

(¡) basic we should add an acid should be added. Slaked lime (Ca(OH)2) and quick lime (CaO) are basic in nature. Urea is neutral. Hence, organic matter is the answer.

Answer 2

i) If the soil is too acidic, we will neutralize it by adding Quicklime/slaked lime.

ii) If the soil is too basic, we will neutralize it by adding manure/organic matter.

hope it helped :))