This brief is divided into four parts. Part one provides a basic description of the agricultural production process as a dynamic flow, producing not only commodities but environmental goods and "bads"(damages). Part two discusses the research agendas that have influenced this production process, and the conflicts between traditional commodity oriented research and the newer environmental research agenda. Part three takes up the common ground uniting these two agendas: a concern for the uses of land and the effects of this use on both commodity and environmental flows. Part four offers some specific recommendations for reforms in land policy and targeting at the national level, the farm level, and the implications of these reforms for agricultural research systems.