Manganese

• An enzyme activator that aids in chlorophyll synthesis
• Closely associated with the micronutrients copper and zinc
• Activates the lipid enzymes
• Essential for assimilation of carbon dioxide in photosynthesis
• Functions in the formation of riboflavin, ascorbic acid, and carotene
• Improves formation of lateral roots

Deficiency Symptoms—When to Apply: 

• Chlorosis and/or mottling due to manganese deficiency
• Plants may be pale green to yellow-red in color between green veins 
• In neutral to alkaline soils high in calcium and in organic soils where manganese is less available