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?A vertical section through the soil is referred to as soil?Water which rises above the water table in the soil…The fertility of the soil is an important factor in…The removal of top soil from a small area of soil…