Which of the following is a soil micro-nutrient? by Sunday | Jul 5 | Agricultural Science WAEC | 0 comments A. magnesium B. potassium C. calcium D. iron E. phosphorus Correct Answer: Option D – iron Users Also Read These:The effect of humus in the soil is make the soil?The vertical section of the soil from the surface…The removal of top soil from a small area of soil…The most obvious physical feature that distinguishes…The relative proportion of each fraction of soil in…