ProGro BIO has released findings from a major third-party study involving over 1,000 soil samples. The research confirms that their flagship microbial inoculant, Rhizol®, significantly improves nutrient retention and organic matter content, helping farmers maximize fertilizer efficiency in real-world conditions.
ProGro BIO Releases New Independent Research Confirming Rhizol® Efficacy
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,” said 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.”
The study was conducted by the North Carolina Department of Agriculture & Consumer Services (NCDA & CS) and Waypoint Analytical. Key metrics include:
- Improved Nutrient Retention: Rhizol-treated soils showed significantly lower nutrient mobility (loss), with specific retention improvements in Zinc (-20.47%), Phosphorus (-11.18%), and Potassium (-6.21%).
- Increased Organic Matter: Treated soils demonstrated a statistically significant increase in Humic Matter (HM%), indicating enhanced biological activity and soil structure.
- Better Plant Uptake: Tissue sampling confirmed higher concentrations of essential nutrients in crops grown in treated soils.
“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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