The control soil sample should be collected within the distance of _______ of the questioned soil spot.
A. 1 inch
B. 3-4 inches
C. 8 inches
D. 1 feet
Answer:B
The control soil sample should be collected within the distance of _______ of the questioned soil spot.
A. 1 inch B. 3-4 inches C. 8 inches D. 1 feet