Results 201 to 210 of about 8,212,561 (277)

Local Structures of Se and Br in Cretaceous–Paleogene Boundary Sediments and Concentration Effects of Ferrihydrite Originating From Impact Ejecta

Geological Journal, EarlyView.
Chemical states of Se and Br atoms in the KPg boundary sediments from Stevns Klint were studied using XAFS spectroscopy. The high concentrations of Se4+ could become an index of the degree to which the global environment was soiled with dust and ash derived from impact ejecta or volcanic eruptions.
Kei‐ichiro Murai, Akira Yoshiasa, Ginga Kitahara, Makoto Tokuda, Satoko Ishimaru, Toshihiro Moriga   +5 more
wiley   +1 more source

Deformation characteristics of weakly cemented overburden in Western mining areas in China. [PDF]

Sci Rep
Zhang G, Zhang H, Li G, Chen J, Zhao L, Zhou G.   +5 more
europepmc   +1 more source

Variable Rate Irrigation: A Long‐Term Simulated and Field Data Analyses of Irrigation Practices, Field Variability, Economic Feasibility and Profitability

Irrigation and Drainage, EarlyView.
ABSTRACT Long‐term economic analyses of variable rate irrigation (VRI) strategies were performed compared with uniform irrigation management (UIM) in a reference production field using the AquaCrop model. Five strategies to trigger irrigation were as follows: (Field Capacity‐VRI, Driest Soil Trigger‐VRI, Water Mining‐VRI, Conventional Uniform ...
Sahil Sharma, Suat Irmak, William Kranz
wiley   +1 more source

Optimal sublevel height and drawing process for horizontal sectional combined mining in steeply inclined, and closely spaced coal seam groups. [PDF]

Sci Rep
Wang H, Bai J, Jiao J, Wang L, Wang L, Jiang B.   +5 more
europepmc   +1 more source

Remote Sensing for Irrigation Water Management—The State of the Art and Prospects for Near‐Future Operations

Irrigation and Drainage, EarlyView.
ABSTRACT A recent UN report describes many regions as facing ‘water bankruptcy,’ a condition in which available water resources can no longer meet existing demands. In practice, this means irrigation will likely bear the greatest burden of future water‐use reductions, a complicated and fraught decision to make given its critical role in food security ...
Wim G. M. Bastiaanssen, Chris Perry, Royce Dalby, Yasir Mohamed, Xueliang Cai, Poolad Karimi, IJsbrand de Jong, Pasquale Steduto, Marat Beksultanov, Christopher C. M. Neale, David Molden, Waqas Awan, Laarousi Mohamed, Jippe Hoogeveen, Jeff Davids, Nutchanart Sriwongsitanon, P. S. Rao, Roula Bachour, Palitha Bandara, Sophea Chhim, Richard Evans, Tom Lahad, D. Nagesh Kumar, Zakaria Adawy, Devendra Singh Bundela, Kawa Hakzi, Isaya Kisekka, Nicolas Puelma, Alejandro A. Pannunzio, Benjamin Koetz, Mukhiddin Ibragimov   +30 more
wiley   +1 more source

Roadway roof shear slip movement mechanism induced by the strong dynamic pressure while ultra-thick coal seam mining. [PDF]

Sci Rep
Liu C, Wang F, Zuo Y, Wang C, Gao C, Lu Y, Sun W, Hao W, Tang T, Zhang Y.   +9 more
europepmc   +1 more source

Insect communities of late Pleistocene steppe–tundra and Holocene boreal forest ecosystems in central Yukon Territory, Canada

Journal of Quaternary Science, EarlyView.
ABSTRACT Subfossil insect communities from the Quartz Creek site provide a detailed record of both Late Pleistocene steppe–tundra and Holocene boreal forest ecosystems in central Yukon Territory, Canada. Fifteen Pleistocene assemblages (marine isotope stages [MIS] 4 to 2) are dominated by steppe–tundra and dry‐tundra taxa, particularly the weevils ...
Scott L. Cocker, Svetlana Kuzmina, Nick Schafstall, Michael A. Monzon, Duane G. Froese   +4 more
wiley   +1 more source

Evolution of fractal dimension and efficient extraction of gas in high-permeability zones under mining-induced pressure relief at Lvtang coal mine. [PDF]

Sci Rep
Wang C, Chang ZC, Li L, Zhao PX, Wang ZC, Guo X, Dong JK.   +6 more
europepmc   +1 more source

Phytotoxicity Assessment of Ashes Generated From Household Combustion of Conventional Fuels, Mixed Fuels, and Municipal Waste

Land Degradation &Development, EarlyView.
ABSTRACT The main aim of the study was to assess the toxicity of ash generated in household furnaces through the combustion of materials most commonly burned in individual households. The toxicity tests were conducted using plant bioassays with cress (Lepidium sativum), mustard (Sinapis) and sorghum (Sorghum) seeds.
Alicja Kicińska, Urszula Klimiuk
wiley   +1 more source

Deviatoric stress evolution and time step control technology of retreat roadway surrounding rock in fully mechanized working face. [PDF]

Sci Rep
Wang Z, Li T, Lin L, An X, Zhao H, Geng X, He J.   +6 more
europepmc   +1 more source