Fact 1: Soil can be depleted of nutrients.

Fact 2: Potassium carbonate is a valuable nutrient for plants.

Given the two facts above, answer the question "Soil can be depleted of which of the following?" with the following options: 
- Potassium carbonate
 - Chlorophyll
 - neon
 - sedimentary rocks
 - carbon monoxide
 - helium
 - Organic compounds
 - vegetation


 

 Potassium carbonate        