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:The soil horizon that is not supportive of the…In which layer of the soil profile do most…The most predominant action in the first horizon of…Soil profile important in agriculture because it?The most important action in the A horizon of a soil…