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:One habit which people living with HIV/AIDS must…Which of the following substances is not usually…Which of the following substances cannot control the…A small stem from a hibiscus plant was placed in a…When a plant shows yellowing of leaves and stunted…