Effects of organic amendment applications on nitrogen and phosphorus losses from sloping cropland in the upper Yangtze River

•Particulate N, P and nitrate N dominated total N, P loss loadings.•Interflow acted as the main pathway for N loss loadings.•Overland flow acted as the major pathway for P loss loadings.•Manure and crop residue combined with mineral fertilization acts as optimal practices for AGNPS pollution control.