Multiple choice

The plant ash is/are the

  1. mineral salts absorbed by the plant

  2. organic matter of the plant

  3. both the mineral salts and organic matter

  4. none of the above

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When a plant is incinerated, the organic matter (carbon, hydrogen, oxygen, nitrogen) is oxidized and lost as gases. The remaining ash consists of the inorganic mineral salts that were absorbed from the soil.