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:Which of the following nutrient element is a micro-nutrient?Which of the following is not regarded as a…The most important soil micro-organism causing decay…If the cross of a red-flowered plant with a…The most common soil mineral found in all…