The continuous simulation Annualized AGricultural Non-Point Source pollution computer model (AnnAGNPS) is a replacement for the existing Agricultural Research Service (ARS) single-event AGNPS model (Yong et al a 1987). The development of AnnAGNPS was a partnering effort between the US Deparment of Agriculture's ARS and Natural Resources Conservation Service (NRCS). ARS provided the management support, funds for travel and some technical support personnel, and most of the research science that was used for the technology incuded in the model. NRCS provided most of the personnel to managem, plan, design and develop the computer program, as well as refine the technology implemented.
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