Fact 1: Soil can be depleted of nutrients.

Fact 2: Fertilizers add nutrients to the soil.

Given the two facts above, answer the question "Soil can be depleted of a thing that fertilizers can what to soil?" with the following options: 
- grow
 - add
 - loss
 - pH
 - harm
 - corn
 - peat
 - kill


 

  add       