Results
#1. What makes up soil? (Select all that apply)
Select all that apply:
#2. What is Humus?
#3. Which of the following is not a type of soil particle.
#4. What is the layer labed as 'O'?
#5. What is the layer labed as 'A'?
#6. What is the layer labed as 'E'?
#7. What is the layer labed as 'B'?
#8. What is the layer labed as 'C'?