Ohio State University recently conducted a study using Tomco’s In-Gest-O-Bac Pit Additive
Organic nitrogen levels were the same while P2O5 and K2O values increased by 2.5 lbs per 1,000 gallons and 2.9 lbs. per 1,000 gallons, respectively. Based on current fertilizer costs this equated to an increase in value of the manure as fertilizer of $3.96 per 1,000 gallons of manure (...) Based on these costs, in the Seneca barn using an average manure production and application rate of 450,000 gallons per year, the increased value of the fertilizer from the treated pit would be $1,782. This represents a return on investment (ROI) of slightly more than 2 to 1, based on first year costs, and almost 3:1 based on Maintenance costs.