In which layer of the soil profile do most biological activities occur? by Sunday | Jan 22 | 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:In which layer of the soil profile does most…SS 1 Second Term Agricultural Science Lesson Note -…Soil profile important in agriculture because it?The topmost layer of a typical soil profile is?In which layer of the soil profile do most…