Agricultural land use and associated nutrient flows in peri urban production systems Urban and peri urban agriculture could play a pivotal role as a recipient of organic waste. But recycling and reuse of solid and liquid organic waste in peri urban agriculture requires planning tools flexible enough to capture the diversity of farming systems and to assess their nutrient status over spatial and temporal scales. This work aims at developing a methodology to determine nutrient flows and budgets at farm village and communal level of peri urban agricultural systems of Hanoi Vietnam by taking into account spatial and temporal variability of crop and nutrient manageme.