Bio Soil Enhancers, Inc organic SumaGrow liquid product was evaluated in 2012 at the Allison Organic Research Farm in southern Warren County and the conventional WIU farm near campus in McDonough County. SumaGrow is a polymicrobial formulation containing multiple strains of naturally occurring soil microbes with humic acid and is intended to inoculate soil to improve plant and soil health and crop yield. Soybean and corn plots were sprayed with the product and grain yields were estimated and compared to control (no spray) plots.
Results: Statistics for the SumaGrow treatment of 1 application at 1.8 gal/a at the WIU site reveal a significant soybean yield improvement using the product with an increase of 9.8 bu/a over the highest yielding control.
Here is the link to a copy of the study report: WIU Soybean Study