Main function of plant nutrients are as given below
Nitrogen : Synthesis of proteins in the plant. It is consumed by plants during growth, flowering and fruiting stages
Phosphorus: Phosphorus is used by plants for cell divisions and energy requirments
Potassium: Potassium is used by plants mainly Transports of sugar, stomata control, cofactor of many enzymes and disease resistance.
Calcium : A major building block of cell wall, reduces susceptibility to diseases
Sulphur: Synthesis of essential amino acids cystin and methionine.
Magnesium: central part of chlorophyll molecule
Iron : Chlorophyll synthesis
Manganese: Necessary in photosynthesis
Boron: Formation of cell wall, germination and elongation of pollen tube, participates in metabolism and transport of sugars
Zinc: Auxins Synthesis
Copper : Influence in the metabolism of nitrogen and carbohydrates
Molybdenum: Component of Nitrate reductase and nitrogenase enzymes.