Which of the following substances must be present in the soil for growth of a healthy green plant? by Sunday | Nov 23 | Biology WAEC | 0 comments A. Amino acids B. Carbon C. Glucose salts D. Magnesium ions Correct Answer: Option D D. Magnesium ions Users Also Read These:Which of the following fertilizers should be applied…The stunted growth of a leguminous plant suffering…A small stem from a hibiscus plant was placed in a…Which of the following substances cannot control the…Which of the following combinations of farm inputs…