The rapid increase in the use of synthetic fertilizers and fossil fuel energy has resulted in the massive perturbance in the N, C, S and P cycles in the atmosphere. The global rate of anthropogenic N fixation is seen exceeding the natural rate of N fixation. There has been a very significant rise in the global N budget during the past century. Asia is also following such trends. Around 26.8% of the global NO_x emissions and 39.4% of the global NH₃ emissions are contributed by Asia. In South Asia also, the emissions and depositions of Nr species are increasing which have multiple environmental and socio-economic consequences. The Indo-Gangetic region has been reported with high deposition of NH₄ and NO₃ due to very high population density and the related activities. Wet deposition of NO₃ has been increased many folds in urban areas during the past two decades due to increasing fuel emissions. According to reports, the rural sites have higher deposition fluxes of NH₃ as compared to the urban sites due to increased agricultural and other related activities which contribute ammonia. This might lead to Eutrophication in future, However, calcium rich atmospheric dust has been a buffering agent controlling the acidification in the region. Since the emission trend of Nr is still upward, there is a need to investigate their depositions and their consequences in South Asia through a measurement network. The new comprehensive measurements need to focus on identifying Nr sources, their transport, gaseous-aerosols phase abundance of Nr species, the role of meteorology in their transformations, regional atmospheric chemistry, in particular, the role of atmospheric dust and the QA/QC of data. The outcome will further help in the integrated assessment of the possible impacts of atmospheric deposition of reactive nitrogen and other trace species on crop systems, water bodies, vegetation, forests, air quality and human health etc. in the region.