Ritu Tomer
Indian Agricultural Research Institute
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Ritu Tomer.
Science of The Total Environment | 2016
Sandeep K. Malyan; Arti Bhatia; Amit Kumar; Dipak Kumar Gupta; Renu Singh; Smita S. Kumar; Ritu Tomer; Om Kumar; Niveta Jain
Methane is one of the critical greenhouse gases, which absorb long wavelength radiation, affects the chemistry of atmosphere and contributes to global climate change. Rice ecosystem is one of the major anthropogenic sources of methane. The anaerobic waterlogged soil in rice field provides an ideal environment to methanogens for methanogenesis. However, the rate of methanogenesis differs according to rice cultivation regions due to a number of biological, environmental and physical factors like carbon sources, pH, Eh, temperature etc. The interplay between the different conditions and factors may also convert the rice fields into sink from source temporarily. Mechanistic understanding and comprehensive evaluation of these variations and responsible factors are urgently required for designing new mitigation options and evaluation of reported option in different climatic conditions. The objective of this review paper is to develop conclusive understanding on the methane production, oxidation, and emission and methane measurement techniques from rice field along with its mitigation/abatement mechanism to explore the possible reduction techniques from rice ecosystem.
Science of The Total Environment | 2016
Niveta Jain; P. Arora; Ritu Tomer; Shashi Vind Mishra; Arti Bhatia; H. Pathak; D. Chakraborty; Vinod Kumar; D. S. Dubey; R.C. Harit; Jogendra Singh
Quantification of greenhouse gases (GHGs) emissions from agriculture is necessary to prepare the national inventories and to develop the mitigation strategies. Field experiments were conducted during 2008-2010 at the experimental farm of the Indian Agricultural Research Institute, New Delhi, India to quantify nitrous oxide (N2O), methane (CH4), and carbon dioxide (CO2) emissions from soils under cereals, pulses, millets, and oilseed crops. Total cumulative N2O emissions were significantly different (P>0.05) among the crop types. Emission of N2O as percentage of applied N was the highest in pulses (0.67%) followed by oilseeds (0.55%), millets (0.43%) and cereals (0.40%). The emission increased with increasing rate of N application (r(2)=0.74, P<0.05). The cumulative flux of CH4 from the rice crop was 28.64±4.40 kg ha(-1), while the mean seasonal integrated flux of CO2 from soils ranged from 3058±236 to 3616±157 kg CO2 ha(-1) under different crops. The global warming potential (GWP) of crops varied between 3053 kg CO2 eq. ha(-1) (pigeon pea) and 3968 kg CO2 eq. ha(-1) (wheat). The carbon equivalent emission (CEE) was least in pigeon pea (833 kg C ha(-1)) and largest in wheat (1042 kg C ha(-1)). The GWP per unit of economic yield was the highest in pulses and the lowest in cereal crops. The uncertainties in emission values varied from 4.6 to 22.0%. These emission values will be useful in updating the GHGs emission inventory of Indian agriculture.
Experimental Agriculture | 2014
A. Daripa; Arti Bhatia; Ritu Tomer; Shweta Singh; Niveta Jain; H. Pathak
A field experiment was carried out at the farm of Indian Agricultural Research Institute, New Delhi to quantify the effect of elevated carbon dioxide (CO 2 ) and different levels of N fertiliser application on nitrous oxide (N 2 O) and carbon dioxide (CO 2 ) emissions from soil under maize. The experiment included five treatments: 60 kg N ha −1 under ambient CO 2 (385 ppm) in open plots, 120 kg N ha −1 under ambient CO 2 (385 ppm) in open plots, 160 kg N ha −1 under ambient CO 2 (385 ppm) in open plots, 120 kg N ha −1 under ambient CO 2 (385 ppm) in open top chambers (OTC) and 120 kg N ha −1 under elevated CO 2 (500 ± 50 ppm) in the OTC. Peaks of N 2 O flux were observed after every dose of N application. Cumulative N 2 O emission was 13% lower under ambient CO 2 as compared to the elevated CO 2 concentrations. There was an increase in CO 2 emissions with application of N from 60 kg ha −1 to 160 kg ha −1 . Higher yield and root biomass was observed under higher N treatment (160 kg N ha −1 ). There was no significant increase in maize yield under elevated CO 2 as compared to ambient CO 2 . The carbon emitted was more than the carbon fixed under elevated CO 2 as compared to ambient CO 2 levels. The carbon efficiency ratio (C fixed/C emitted) was highest in ambient CO 2 treatment in the OTC.
Current World Environment | 2016
Sandeep K. Malyan; Arti Bhatia; Om Kumar; Ritu Tomer
PUBLICATION INFO International Journal of Agricultural Invention (IJAI) RNI: UPENG/2016/70091 ISSN: 2456-1797 (P) Vol.: 1, Issue: 2, Pages: 124-128 Journal Homepage URL http://agriinventionjournal.com/ DOI: 10.46492/IJAI/2016.1.2.1 ABSTRACT Methane is second most potent greenhouse gas emitted under anaerobic condition in rice soils. Effects of different nitrogen fertilizer application on methane emissions in flooded paddy field were studied. The experiment was laid out in a randomized complete block design with three treatments and three replications. The treatments were control (0 kg N ha1), urea (120 kg N ha-1) and ammonium sulfate (120 kg N ha-1). In all treatments P (60 kg P2O5 ha-1) along with K (40 kg K2O ha-1) were also applied as basal dose. The cumulative seasonal methane flux was highest in urea 36.3 (kg ha-1) followed by control 35.2 (kg ha-1) and ammonium sulfate 28.5 (kg ha-1). Ammonium sulfate application reduced total seasonal emission by 19.5% as compared to control while it reduced CH4 emissions by 21.6% as compared to urea application. On the basis of this study we can conclude that application of ammonium sulfate is an effective tool for mitigating methane emissions from rice soils.
Agriculture, Ecosystems & Environment | 2011
Arti Bhatia; Avijit Ghosh; Vinod Kumar; Ritu Tomer; Shweta Singh; H. Pathak
Environmental Monitoring and Assessment | 2013
Satyavan Singh; Arti Bhatia; Ritu Tomer; Vinod Kumar; Bikram Pratap Singh; Shweta Singh
Environmental Monitoring and Assessment | 2012
Arti Bhatia; H. Pathak; Niveta Jain; P. K. Singh; Ritu Tomer
Agriculture, Ecosystems & Environment | 2016
Dipak Kumar Gupta; Arti Bhatia; Amit Kumar; T.K. Das; Niveta Jain; Ritu Tomer; Sandeep K. Malyan; R.K. Fagodiya; R. Dubey; H. Pathak
Aerosol and Air Quality Research | 2015
Ritu Tomer; Arti Bhatia; Vinod Kumar; Amit Kumar; Renu Singh; Bhupinder Singh; S.D. Singh
Maydica | 2013
Arti Bhatia; Vinod Kumar; Amit Kumar; Ritu Tomer; Bhupinder Singh; Shivdhar Singh