School Of Environment And Earth Sciences

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    Recent advances in nanotechnology for the improvement of conventional agricultural systems: A review
    (Elsevier B.V., 2023-05-18T00:00:00) Yadav, Neelam; Garg, Vinod Kumar; Chhillar, Anil Kumar; Rana, Jogender Singh
    Agriculture provides food and raw materials for the construction, energy, textile and pharmaceutical industries. Recently, agriculture is facing several concerns including climate change, soil degradation, decreasing land holding, urbanization, unsustainable use of natural resources, excessive use of agrochemicals, biodiversity loss, air pollution etc. are some of alarming issues which demand immediate interventions. Conventional agricultural practices could not handle these challenges as they are complex, labour intensive, time-consuming, less efficient, large requirements of crop nutrients and non-targeted. Furthermore, the inefficient use of agrochemicals poses a serious threat to the ecosystem. Therefore, scientists, farmers and policymakers are constantly searching for new techniques to combat existing challenges. Nanotechnology is emerging as the new savior of sustainable agriculture. Besides precision farming, nanosensors have been employed for the detection of crop pathogens and chemically harmful analytes in agri-fields. Moreover, nanorobotics and nano-barcodes have also shown a profound impact on agriculture practices to enhance the yield of agriculture. Further, tremendous applications of nanotools in agriculture are extensively implicated in bioimaging, sensing, photocatalysis and agrochemicals delivery. This review comprehensively discusses diverse tremendous applications of nanotechnology in overcoming the challenges of conventional agronomic practices and future prospects of nanotechnology in agriculture. � 2023 The Authors
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    Mapping of Surface Water Bodies in Punjab and High Resolution of Remote Sensing Data
    (Central University of Punjab, 2018) Ahmed, Mukhtar; Singh, Kiran K.
    This study is an attempt to create boundary of Punjab state and surface water bodies map from NATMO atlas map, SOI map, Landsat-8 data and Google Earth image using GIS software. It has also compared the variation in status which is extracted from the data or image of various scale or resolution. According to NATMO data, the water bodies in Punjab are 1476. 109km2 (excluding canals), according to Landsat-8 are 2844.55 km2 (including canals), according to SOI are 764.93 km2 and according to Google earth are 141.06 km2. Variation in the status of the area and length of surface water bodies is due to the scale and resolution of images. High resolution image is capable of creating precise boundaries. The purpose of this study was to create precise boundaries of the state and water bodies. Management of water bodies calls for generation of multiple inventories and demarcation of precise boundary is one of the inventories. This study also suggests the Map making organisations to revise their maps by using recent geospatial technologies.
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    Multifaceted application of crop residue biochar as a tool for sustainable agriculture: An ecological perspective
    (Elsevier, 2015) Singh,Rishikesh; Babu, J. Nagendra; Kumar,Rabindra; Srivastava,Pratap; Singh, Pardeep; Raghubanshi,Akhilesh Singh
    Lignocellulosic crop residue biomass, in surplus, is of vital importance due to its multifaceted utilization potential on- and off-site to agricultural systems; therefore, its management is essential for sustainable agriculture. The malpractice of open crop residue burning leading to the brown cloud phenomenon and contributing significantly to atmospheric heterogeneity through enhanced gaseous and particulate emissions is of greater off-late concern. Available traditional crop residue management (CRM) technologies have not achieved wider adaptation; therefore, recently thermochemical conversion has been foreseen as an interesting tool for potential CRM under changing climate scenario. Biochar, a by-product of thermochemical processes, has been evaluated as a potential soil ameliorant and C sequestration agent. As soil ameliorant, it improves soil basic properties directly along with subdued release of greenhouse gases from agroecosystems, provides adsorption surface to agrochemicals and improves essential nutrient dynamics. Since the potential benefits of biochar in soil are governed by initial pyrolysis conditions and soil types; therefore, its wider utilization potential as suitable tool in sustainable agriculture and climate change mitigation needs to be critically analyzed before its specific recommendation to an agroecosystem. The present review provides a critical insight on current research on various aspects, particularly ecological, of crop residue biochar starting from the feedstock sources, pyrolysis conditions and changes after application. Additionally, a brief account is given on the agronomic relevance and major constraints of biochar amendment as an ecological engineering tool for sustainable agriculture. After reviewing various aspects of crop residue as feedstock, we recommend its use as a blend, rather than sole use, along with several other lignocellulosic materials under pyrolysis process as well as ameliorating agent. ? 2015 Elsevier B.V.