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:An isotope has an initial activity of 120 Bq. 6 days…The most predominant action in the first horizon of…The B-Horizon of soil profile is also called the?In which layer of the soil profile do most…In which layer of the soil profile do most…