The horizon of soil profile which encourages the greatest level of microbial activity is? by Sunday | Jul 4 | Agricultural Science WAEC | 0 comments A. A-horizon B. B-horizon C. C-horizon D. D-horizon Correct Answer: Option A – A-horizon Users Also Read These:In which layer of the soil profile do most…In a soil profile; the C-horizon can be described as the?Which of the following farming practices encourages…A soil profile refers to the?The most predominant action in the first horizon of…