Search Results       Your search for [subject]Soil conservation -- Economic aspects -- United States -- Congresses returned 1 record.           Optimum erosion control at least cost : proceedings of the national aymposium on conservation systems, December 14-15, 1987, Hyatt Regency Chicago in Illinois Center. St. Joseph, Mich., USA: American Society of Agricultural Engineers, 1987. Subject: Soil conservation -- United States -- Congresses; Soil conservation -- Economic aspects -- United States -- Congresses.          Add to Book Cart Relevance: 29.21%