Ajay Singh

Clemson University | CU · Department of Plant & Environmental Sciences

Crop residues in agriculture pose disposal challenges and contribute to air pollution when burned. This study aims to use pigeonpea and maize stalks to produce biochar at different pyrolysis temperatures. Biochar can serve in carbon sequestration, as a soil amendment, and as an alternative fuel source. Pyrolysis was conducted at 400, 500, and 600 °...

Crop residues in agriculture pose disposal challenges and contribute to air pollution when burned. This study aims to use pigeonpea stalks and maize biomass to produce biochar. Biochar can serve as a soil amendment for carbon sequestration and as an alternative fuel source. Pyrolysis were conducted at different temperatures (i.e., 400, 500, and 600...

: The disposal of crop residues from agricultural fields is often seen as a burden due to the difficulties involved. However, this study aims to turn pigeonpea stalks into biochar, which can serve as a fuel substitute and soil amendment to sequester carbon. Different pyrolysis methods were employed to investigate the variations in yield, physicoche...

Climate and agriculture experts emphasize the need to develop a carbon sink in the soil to help alleviate the effects of climate change. A 2‐year field experiment in semiarid tropical drylands tested sustainable nutrient management approaches to sequester carbon in the soil. We analyzed nine different treatments, including chemical fertilizers (as...

A continuously declining carbon in soils of drylands has increasingly become a source of concern and needs integrated solutions to achieve global food security and sustainability goals. This study analysed the impact and sustainability of management practices for climate change mitigation and food security in dryland tropics using long-term feld tr...

Agricultural practices naturally interject greenhouse gases (GHGs) into the atmosphere; consequently, analyzing decadal variation in N2O, CO2, and CH4 is indispensable over a major rice cultivating area (West Bengal) in subtropical India. Analysis of EDGAR data shows an unremitting increase in GHGs in the study region over two decades. The increasi...

Soil carbon depletion is a major concern for food security in drylands. The objective of this study is to test tillage with residue management under sequential and intercropping systems for carbon sequestration in semi-arid tropical drylands of India. We report the findings from a long-term field experiment (9 years) used to simulate the effect of...

Atmospheric CO2 is the key Greenhouse Gas in terms of its global warming potential and anthropogenic sources. Therefore, it is important to analyse the changes in the concentration of atmospheric CO2 to monitor regional and global climate change. Here, we use ground-based and satellite measurements for the 2002–2020 period to assess CO2 over India....

India relies heavily on coal-based thermal power plants to meet its energy demands. Sulphur dioxide (SO2) emitted from these plants and industries is a major air pollutant. Analysis of spatial and temporal changes in SO2 using accurate and continuous observations is required to formulate mitigation strategies to curb the increasing air pollution in...

Agricultural practices contribute to greenhouse gas (GHG) emissions; therefore, it is essential to modify the production technologies. We analyzed decadal variation in CO 2 and CH 4 over a major rice cultivating area in subtropical India using GOSAT satellite data, which shows a sturdy increase. Furthermore, we carried out long-term field experimen...

A nationwide lockdown was imposed in India from 24 March 2020 to 31 May 2020 to contain the spread of COVID-19. The lockdown has changed the atmospheric pollution across the continents. Here, we analyze the changes in two most important air quality related trace gases, nitrogen dioxide (NO2) and tropospheric ozone (O3) from satellite and surface ob...

Atmospheric carbon dioxide (CO2) is an important greenhouse gas (GHG) due to its high contribution to global warming. The CO2 concentrations have increased significantly across the world after the industrialization. The anthropogenic provenance to the concentration of CO2 needs immediate mitigative interventions. India is a global agricultural powe...

Continuous use of chemical fertilizers is detrimental to soil health and crop productivity. Therefore, we need to recycle the agroresidues in the valorized form (e.g., biochar or compost) to improve soil quality while maintaining crop yield. This study compares different nutrient management practices using varied dose combinations of biochar/compos...

Methane (CH 4) is a prominent Greenhouse Gas (GHG) and its global atmospheric concentration has increased significantly since the year 2007. Anthropogenic CH 4 emissions are projected to be 9390 million metric tonnes by 2020. Here, we present the long-term changes in atmospheric methane over India and suggest possible alternatives to reduce soil em...

Atmospheric ammonia (NH3) is an alkaline gas and a prominent constituent of the nitrogen cycle that adversely affects ecosystems at higher concentrations. It is a pollutant, which influences all three spheres such as haze formation in the atmosphere, soil acidification in the lithosphere, and eutrophication in water bodies. Atmospheric NH3 reacts w...

Methane is an important atmospheric trace gas involved in determining the radiative balance of Earth surface. The concentration of methane has increased significantly (approx 150%) after industrialization that attributable to intensive agricultural activities and urbanization. It is also a major driver of climate change in post industrialized era,...