where CNi is the cost form anaging solid-state nitrogen loss from agricultural activity i (RMB ¥/kg); NC is the nitrogen content of the soil (%). The cost for controlling dissolved nitrogen loss is estimated by:
where CNi is the cost form anaging solid-state nitrogen loss from agriculturalactivity i (RMB ¥/kg); NC is the nitrogen content of the soil (%). The cost for controlling dissolved nitrogen loss is estimated by: