Which of the following substances must be present in the soil for growth of a healthy green plant? By: Sunday|Published on: Nov 23|Categories: 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:One of these is present in both plant and animal cell?Which of the following combinations of farm inputs…The stunted growth of a leguminous plant suffering…Which of the following substances cannot control the…Which of the following is a nitrogen-fixing…SEE ALSO Which of the following is not an outcome of ecological succession?