Bhagawan Bharali1, Bhupendra Haloi2 and Jayashree Chutia3 and Pradip Chandra Dey4 Department of Crop Physiology, Assam Agricultural University, India 1 bbharali33@rocketmail.com   Abstract In survey works at urban and peri-urban areas of Assam, data were collected on air samples for Oxides of Nitrogen (NOx) and Ammonia (NHy). The concentrations based on trapping and diffusion of […]