In which layer of the soil profile do most biological activities occur? By: Sunday|Published on: Jan 22|Categories: Agricultural Science WAEC| 0 comments A. D-horizone B. C-horizone C. B-horizone D. A-horizone Correct Answer: Option D D. A-horizone Users Also Read These:Which of the following activities constitutes…In which layer of the soil profile does most…The most important action in the A horizon of a soil…In which of the soil layer does most biological…In which layer of the soil profile do most…SEE ALSO The quantity of food crop available for sale at the current market price over a period of time is known as?