During the period from December 2004 to November 2005,atmospheric deposition was monitored at the Yingtan Red Soil Ecological Station,Chinese Academy of Sciences,in Jiangxi Province.Observation data were analyzed with focus on concentrations of nitrogen oxidants and nitrogen deposition flux.Over the farmland,the concentrations of NH₃,NO_x,organic nitrogen(ON) were 24.6,3.54,and 7.2 μg m^-3,respectively,in the atmosphere,4.16,4.64 and 0.92μg m^-3,respectively,in aerosols,and 0.89,0.73 and 0.26 mg L^-1,respectively,in precipitation.The total nitrogen deposition is N 6.26 g m^-2,of which 3.19 g m^-2 or 51% was dry deposition,and 3.07 g m^-2 or 49% wet deposition,and 5.47 g m^-2 or 87.4%,inorganic nitrogen and 0.79 g m^-2 or 12.6% organic nitrogen.Compared with other types of landuse,such as grassland,forest and lake,farmland receive more atmospheric nitrogen deposition in Jiangxi Province,which will have significant impact on nitrogen balance within the farmland ecosystem.