Browsing by Author "Ajay Kumar Mishra"

Now showing 1 - 7 of 7

An Assessment of Popular Virtual Platforms for Online Education in COVID-19 Pandemic in India: A Study
(Springer Science and Business Media Deutschland GmbH, 2021) Satyajeet Arya; Amit Kumar Bundela; Sunidhi Thakur; Pinaki Chattopadhyay; Pallavi Chattopadhyay; Ajay Kumar Mishra; Krishna Pratap Singh
Online education is not new to the twenty-first century, especially to higher education. It is known since early 2000 and continues. Traditional education is offered in all government institutions in India. However, in March 2020, Education turned 360° immediately after the COVID-19 pandemic, which allegedly originated in Wuhan city of China in late December 2019. Since then, all the Educational Institutions including schools, colleges, universities, coaching centers insisted to shut down for an unknown time by the government to maintain social distancing and mitigating COVID-19 spread. Due to this, the traditional system was bound to shift to Online Education (OE). In this chapter, challenges that occurred due to the immediate shift to the online education system are discussed. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Carbon sequestered through biomass and soil organic carbon dynamics in jatropha curcas L
(2014) Ajay Kumar Mishra; Kshama Singh; Kailash Singh; Shalini Srivastava; Md. Sarware Alam; Sharik Ali
Revegetation of degraded land is a big challenge in present scenario where per capita land availability is reducing drastically. According to the latest estimates about 187.8 mha (57% approximately) out of 328.73 mha land has been degraded in India. Jatropha curcas L. (Jatropha) known as a bio fuel plant, is suitable for revegetation of degraded land. However, soil organic carbon (SOC) dynamics under Jatropha plantations are still not well understood. The objective of this study was to quantify soil organic carbon (SOC) and carbon sequestration potential under two-year-old Jatropha plantation spread over 300 hectares, at Barkaccha, Rajiv Gandhi South Campus (BHU), Mirzapur, Uttar Pradesh, India. Soil samples were collected periodically at three month interval (January and April) from the two soil depths i.e. 0-15 and 15-30 cm. In this study, instead of the more popular diameter at breast height (DBH), collar diameter (diameter at stem base) was used because the stem of Jatropha hardly grew at DBH level. The total plant biomass (leaves, branches and coarse roots) was quantified by multiplying the average dry biomass of one individual by the number of trees per hectare. Carbon sequestered in January and April for aboveground dry biomass were 0.85 and 0.93 t/ha and for belowground dry biomass were 0.17 and 0.19 t/ha. These results revealed that the potential of carbon sequestration in Jatropha was higher as found in crops and can be adopted to reclaim waste land and to mitigate climate change. Copyright © EM International.
Connecting Climate-Resilient Farming Practices with Regenerative Agriculture for Enhancing Productivity, Profitability, and Environmental Security
(Springer Science and Business Media B.V., 2025) Rajeswari Das; Ajay Kumar Mishra; Vivek Manyapu; Shiveshwar Pratap Singh; Biswabara Sahu; Sangita Limma; Anjali; Subhrajyoti Mishra; Monalisha Sahoo; S. H. Sharma
The sustainability of diverse agro-ecologies at the global and regional scale is threatened by multifaceted challenges offered by climate change and food insecurity due to poverty, hunger, obesity, corporate dominance, a lack of resilience, industrial farming, an overreliance on chemical fertilizers and pesticides, poor food quality, environmental degradation, biodiversity loss, unfair labor practices, and animal welfare. Greenhouse gas emissions and soil degradation compound the ill effects of climate change on livelihood security. To address these challenges a paradigm shift from conventional agriculture to regenerative agriculture is required. The transition from conventional to climate-resilient agriculture and translation into regenerative agriculture focuses on the environmental aspect of sustainability, which includes increased nutrient cycling, improved soil health, optimal resource management, reduced climate change, and improved water quality and availability. This chapter addresses constraints and pathways for improving food security by provisioning food, feed, and fibre; regulating climate, soil erosion, and water purification; and supporting nutrient cycling and soil formation. Furthermore, this appraisal highlights the significance of integrated farming practices along with soil and crop diversification options to improve the livelihoods of small and marginal farmers. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.
Effect of Conservation Agriculture on Energy Consumption and Carbon Emission
(Springer International Publishing, 2022) Ajay Kumar Mishra; R. Roohi; Hardeep Singh Sheoran; Sarita Mishra; Astha Pandey; Diksha Sah; Mohammad Amin Bhat; Sheetal Sharma
Conventional agriculture systems with an increased cost of cultivation reduce partial factor productivity, and deterioration of energy, soil, water, and environmental quality threatens food security and aggravates climate change. A holistic package of reduced tillage, residue recycling, crop diversification, and best-bet agronomic practices offered by the conservation agriculture (CA) system seems promising in achieving food security and developing climate resilience in the food production system. This study highlights the overview of CA system, global and national status of CA, opportunities and constraints in adoption of CA, resource efficiencies, particularly energy budgeting in CA, the scope of climate resilience and greenhouse gas emissions (GHGs) mitigation through CA adoption, indices of soil health and carbon sequestration potential under CA systems, and prospects and critical areas of research for scaling of CA systems. Synergies and trade-offs need to be precisely taken care of for need-based site-specific redesigning of CA systems for assured farmer’s income, ecological services, and sustainable development. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2022, Corrected Publication 2022.
Evaluation of Chenopodium ambrosioides oil as a potential source of antifungal, antiaflatoxigenic and antioxidant activity
(2007) Rajesh Kumar; Ajay Kumar Mishra; N.K. Dubey; Y.B. Tripathi
Essential oil extracted from the leaves of Chenopodium ambrosioides Linn. (Chenopodiaceae) was tested against the aflatoxigenic strain of test fungus Aspergillus flavus Link. The oil completely inhibited the mycelial growth at 100 μg/ml. The oil exhibited broad fungitoxic spectrum against Aspergillus niger, Aspergillus fumigatus, Botryodiplodia theobromae, Fusarium oxysporum, Sclerotium rolfsii, Macrophomina phaseolina, Cladosporium cladosporioides, Helminthosporium oryzae and Pythium debaryanum at 100 μg/ml. The oil showed significant efficacy in inhibiting the aflatoxin B1 production by the aflatoxigenic strain of A. flavus. During in vivo investigation it protected stored wheat from different storage fungi for one year. Chenopodium oil also exhibited potent antioxidant activity when tested by ABTS method. All these observations suggest the possible exploitation of the Chenopodium oil as potential botanical fungitoxicant in ecofriendly control of post harvest biodeterioration of food commodities from storage fungi. © 2006 Elsevier B.V. All rights reserved.
Microplastics in the Atmosphere: Identification, Sources and Transport Pathways
(CRC Press, 2024) Rahul Arya; Jaswant Rathore; Ajay Kumar Mishra; Arnab Mondal
Microplastic (MP) pollution is a rising concern due to the overexploitation of plastics and absence of systematic dumping of plastic residue. The size of plastic particles ranging below 5 mm are termed as microplastics. Initial investigations focused on the effects of microplastic pollutants on marine as well as terrestrial ecosystems; however, recent studies have drawn attention to their presence in the atmosphere. The existence of fragmented plastics in the air was first reported in 2016, and thereafter, they were reported to be found in multiple studies conducted various environments, both indoor and outdoor conditions. The deficiency of data and lack of knowledge about their presence can be accredited to their prompt and long-range transport, which is aided by their smaller size. The current challenges with dearth of standard sampling procedures and detection approaches have limited the number of studies on airborne microplastic pollutants. Therefore, there exist large gaps in knowledge about their occurrence, horizontal and vertical distribution and their impact on air quality, ecosystem and human life. This chapter attempts to provide a broad illustration of current state of knowledge regarding atmospheric microplastics. In this chapter, we have attempted to provide an insight into microplastics in the atmosphere, its sources, types, transport pathways and an overview of the present measurement techniques along with its impacts. © 2024 selection and editorial matter, Surajit Mondal, Papita Das, Arnab Mondal, Subhankar Paul, Jitendra Kumar Pandey and Tapas K. Das. All rights reserved..
Standing carbon stock estimation in different tree species grown in dry tropical forests of vindhyan highland, Mirzapur, India
(2013) Ajay Kumar Mishra; Jogendra Singh; Vivek Kumar; Rajani Srivastava; Shalini Srivastava
This study was carried out to investigate total carbon sequestration in ten dominant tree species grown in Rajiv Gandhi South Campus, Bañaras Hindu University, Barkaccha, Mirzapur, India having an area of 2760 acres. To estimate biomass from selective tree species, it is not advisable to cut them for this reason, non-destructive method is employed. The essential parameters required for the measurement of biomass and carbon stock is height, girth and wood density. Height measurement is based on shadow method and girth taken as Diameter at Breast Height (dbh) as 1.36 meter high above the ground. The study revealed that the height (0.70) and girth (0.93) showed positive correlation with carbon stock of selective tree species and has advantage over destructive method used for biomass and carbon stock estimation. Carbon storage in individual tree species varies from 0.04 tonnes (Acasia catechu) to 25.65 tonnes (Madhuca longifolia) © EM International.