Plant Soil (2014) 383:3–41
Agricultural uses of plant biostimulants by Pamela Calvo & Louise Nelson & Joseph W. Kloepper
This article describes the emerging definitions of biostimulants and reviews the literature on five categories of biostimulants:
i. microbial inoculants, ii. humic acids, iii. fulvic acids, iv. protein hydrolysates and amino acids, and v. seaweed extracts.
Conclusions The large number of publications cited for each category of biostimulants demonstrates that there is
growing scientific evidence supporting the use of biostimulants as agricultural inputs on diverse plant
species. The cited literature also reveals some commonalities in plant responses to different biostimulants, such
as increased root growth, enhanced nutrient uptake, and stress tolerance.
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Agricultural uses of plant biostimulants Joseph Kloepper (WEB)