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Nanoemulsions of nanofertilizers are being used as sprays to foliar products of plants either in seedling or early vegetative stages (Abdel‐Aziz et al. 2019).

From several studies, it was suggested that foliar application is the best method to apply nanofertilizers to plants. Seed priming with nanofertilizers could be toxic to embryo cells of seeds and therefore seeds abort to germinate. On the other hand, soil incorporation of nanofertilizers fails to give the desired target because of the presence of soil microflora which could easily degrade and decompose the tiny nanofertilizers in soil (Abdel‐Aziz et al. 2019).