ProGro BIO has released significant new independent research validating the efficacy of its flagship microbial soil inoculant, Rhizol®. The study, involving over 1,000 soil samples, confirms that Rhizol delivers measurable improvements in nutrient retention, organic matter, and crop uptake, helping farmers maximize fertilizer efficiency.
ProGro BIO Releases New Independent Research
ATLANTA, Jan. 7, 2026
ProGro BIO today announced new third-party research demonstrating that Rhizol®, the company’s flagship microbial soil inoculant, delivers impressive and measurable improvements to soil health and crop nutrition across real-world field conditions. The findings, based on more than 1,000 independently analyzed soil samples, confirm what growers consistently report when using Rhizol: stronger soils, better nutrient efficiency, and crops that make better use of available fertility.
“Growers want products that prove themselves in the field, not just in a lab,” emphasized Zach Lancaster, Director of Field Agronomy & Grower Relations. “What this independent data shows is exactly what growers who integrate Rhizol in their operations are experiencing. Rhizol helps keep nutrients where they belong, strengthens soil function, and supports better in-season crop performance.”
The research was conducted by the North Carolina Department of Agriculture & Consumer Services (NCDA & CS) Agronomics Division. Key takeaways include:
- Improved Nutrient Retention: Post-harvest nutrient mobility was consistently lower in Rhizol-treated soils, indicating significantly better retention of Phosphorus (-11.18% difference vs. control), Potassium, Sulfur, and Zinc.
- Increased Organic Matter: Soils treated with Rhizol demonstrated a meaningful, statistically significant increase in Humic Matter (HM%), indicating improved fertility and biological activity.
- Enhanced Plant Uptake: Independent tissue sampling by Waypoint Analytical showed that crops grown in Rhizol-treated soils displayed higher tissue concentrations of essential nutrients.
“Farmers are being asked to do more with less—protect their soils, reduce nutrient loss, and still deliver strong yields,” said Blake Young, CEO of ProGro BIO. “Rhizol’s remarkable ability to provide a dual benefit – stronger agronomics and improved environmental stewardship – is increasingly important as growers balance productivity with compliance and sustainability objectives.”
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