The soil nutrient which is important as a constituent of plant proteins and hormones is? by Sunday | Jul 7 | Agricultural Science WAEC | 0 comments A. calcium B. magnesium C. iron D. potassium E. sulphur Correct Answer: Option E – sulphur Users Also Read These:STB 415 Theory Questions: Soil Nutrient Depletion…A small stem from a hibiscus plant was placed in a…Autonomy of constituent units is an important feature of?Plant hormones include the following except?Which of the following nutrient element is a macro-nutrient?