What is the optimal soil pH for most plant growth? Why is this so?
Select one:
A. 4-5, due to the fact that the majority of soil nutrients are only present at the this pH
B.6-7, due to the fact that the majority of soil nutrients are soluble at the this pH
C. 9-10, due to the fact that the majority of soil nutrients can be absorbed by roots at the this pH
D. 6-7, due to the fact that the majority of soil nutrients are created in soils with this pH