Zinc: Involved in production of growth hormones and chlorophyll. Active in respiration and carbohydrate synthesis.
Boron: Involved in formation of cell walls, terminal buds and pollen tubes. Participates in regulation of starch production and translocation of sugars and starches.
Calcium: Involved in formation of cell walls and root and leaf development. Participates in translocation of sugars.
Copper: Involved in photosynthetic and respiration systems. Assists chlorophyll synthesis and used as reaction catalyst.
Iron: Involved in respiration and chlorophyll synthesis.
Magnesium: Involved in photosynthetic and respiration system. Active in uptake of phosphate and translocation of phosphate and starches.
Manganese: Involved in regulation of enzymes and growth hormones. Assists in photosynthesis and respiration.
 

Molybdenum: Involved in enzymatic reduction of nitrates to ammonia. Assists in conversion of inorganic phosphate to organic form.
Sulfur: Involved in formation of nodules and chlorophyll synthesis, structural component of amino acids and enzymes.