The horizon of soil profile which encourages the greatest level of microbial activity is? By: Sunday|Published on: Jul 4|Categories: 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:A soil profile refers to the?The lowest part in the soil profile is known as?In which layer of the soil profile does most…The most important action in the A horizon of a soil…In a soil profile; the C-horizon can be described as the?SEE ALSO The following are the advantages of the sprinkler method of irrigation except?