Ann: Greenpower Secures Exclusive OHD License, page-101

Unfortunately none the extracts paragraphs reproduce are from peer reviewed scientific journals - here's a "review" specially for you

journal.frontiersin.org/article/10.3389/fpls.2016.02049/pdf

Pat Brown is an Australian who studied at the Waite Institute in Adelaide and then moved to the US.

The conclusion of the review is:

Many have noted the state confusion in the field of biostimulants (Torre et al., 2013; Traon et al., 2014) and this has resulted in the opinion that much of the biostimulant market is not based on science or efficacy and that many products are little more than recycled waste products sold on the basis of pseudoscience and marketing. Indeed, research on several biostimulant products has shown them to be ineffective or to contain inactive, unstable or inconsistent properties with several showing negative effects compared when contrasted with well-designed controls (Csizinszky, 1984, 1986; Albregts et al., 1988; Di Marco and Osti, 2009; Vasconcelos et al., 2009; Banks and Percival, 2012; Cerdan et al., 2013; de Oliveira et al., 2013; Carvalho et al., 2014).