Fact 1: Soil can be depleted of nutrients.

Fact 2: Dirt is really misplaced soil.

Given the two facts above, answer the question "When gardening what can be depleted of nutrients?" with the following options: 
- fertilizer
 - bacteria
 - the plant
 - coal
 - pine
 - the dirt
 - Acids
 - water


 

      the dirt   