2006 Annual Report 4d.Progress report. This report serves to document research progress under a Cooperative Agreement 58-1035-5-524 with The Rodale Institute. Additional details of this research can be found in the report of the parent CRIS 1935-12000-010-00D Development of efficient and practical methods for producing arbuscular mycorrhizal fungi. This project utilizes the resources of the Rodale Farming Systems Trial to study the contribution of glomalin deposited by AM fungi to the observed increase in soil organic matter in organically-farmed soils relative to conventionally-farmed soils, and as such contributes to Milestones of Objective 3 of the parent CRIS. Field sampling for this experiment will begin in autumn 2006. In addition, wheat, corn, and soybean grain produced in the Farming Systems Trial are used in mouse feeding studies to study the potential health impacts of eating grains produced organically vs. via using chemical fertilizers and pesticides. These studies are ongoing.