4fcb4a28_Quick_Guide_to_Plant_Nutrition__Signs_of_Deficiency
[Primary Nutrients] Magnesium (Mg) [Function in Plant] Component of chlorophyll; aids in enzyme functions; assists in metabolism and processing nutrients; involved in synthesis of fats, sugars, and oils [Sources for Fertilizer] Epsom salt Coffee grounds Matches [Signs of Deficiency] 
Chlorosis (yellowing between veins in leaves); leaf drop
A Quick Guide to Plant Nutrition
Signs of Deficiency