This element, symbol Mg, is essential to the diet & to green plants
[DOC] [TLE] Essential Nutrients for Plants - Boundless [PAR] Biology Textbooks Boundless Biology Soil and Plant Nutrition Nutritional 
Requirements of ... An element is essential if a plant cannot complete its life cycle 
without it, if no other ... Magnesium (Mg) and calcium (Ca) are also important 
macronutrients.