Growing Returns, a Blog of the Environmental Defense Fund, discusses efforts led by Soil Fertility Specialist and School of Environment and Natural Resources Assistant Professor Steve Culman, in the post authored by Karen Chapman, “New guidance to maximize every drop of fertilizer in Ohio and beyond,” to update the Tri-State Fertility Guide for Corn, Soybean, Wheat and Alfalfa. To update the Tri-State Guide, Culman is using data from on-farm research trials he and his team have been conducting. This data will be used to inform the new Tri-State recommendations.