Question

The main target when controlling the acidity of soils is ______. a. neutralizing the pH b. adding base c. replacing lost cation nutrients d. eliminating humic acids

Answer 1

Answer: C. replacing lost cation nutrients

Answer 2

C

Step-by-step explanation:

Acidic soils mean they have more of Al3+ and H+ ions which are acid forming cations. These cations make alkaline forming ions unavailable to plants as nutrients. When the pH of the soil is raised, the Al3+, Fe3+, and H+ are neutralized. The ions bind with –OH ions hence releasing the ions in the negatively-charged sites on the hummus to play a role in the nutrient exchange.