title: Tropospheric ozone pollution in India: effects on crop yield and product quality.
abstract: Ozone (O3) in troposphere is the most critical secondary air pollutant, and being phytotoxic causes substantial losses to agricultural productivity. Its increasing concentration in India particularly in Indo-Gangetic plains is an issue of major concern as it is posing a threat to agriculture. In view of the issue of rising surface level of O3in India, the aim of this compilation is to present the past and the prevailing concentrations of O3and its important precursor (oxides of nitrogen) over the Indian region. The resulting magnitude of reductions in crop productivity as well as alteration in the quality of the product attributable to tropospheric O3has also been taken up. Studies in relation to yield measurements have been conducted predominantly in open top chambers (OTCs) and also assessed by using antiozonant ethylene diurea (EDU). There is a substantial spatial difference in O3distribution at different places displaying variable O3concentrations due to seasonal and geographical variations. This review further recognizes the major information lacuna and also highlights future perspectives to get the grips with rising trend of ground level O3pollution and also to formulate the policies to check the emissions of O3precursors in India.
authors.affiliation: Laboratory of Air Pollution and Global Climate Change, Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
authors.forename: Aditya Abha
authors.initials: AA
authors.lastname: Singh
authors.affiliation: Laboratory of Air Pollution and Global Climate Change, Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India. sbagrawal56@gmail.com.
authors.forename: S B
authors.initials: SB
authors.lastname: Agrawal
mesh_terms: D000383:Agriculture; D000393:Air Pollutants / Q000032:analysis; D018556:Crops, Agricultural / Q000737:chemistry*; D007194:India; D010126:Ozone / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D010126:Ozone
keywords: Crop productivity; Ethylene diurea; India; Oxides of nitrogen; Ozone; Quality; Yield