Trace elements or micronutrients play a major role in the metabolism of both plants and humans. Zinc has a major specific role in metabolism when compared with other elements. The microbial biofertilizers are applied in the form of seaweed liquid extracts, microbial inoculants, biostimulators and biofortification agents. All these categories of microbial biofertilizers are involved in the enhancement of plant nutrient uptake. In the present study, Spirulina platensis is used as a biofortification agent to enhance zinc levels in cultivars of Amaranthus gangeticus, Phaseolus aureus and Tomato. Different experimental methods were followed including soaking seeds in different concentrations of Spirulina
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