Academic literature on the topic 'Grain size groups and subgroups of soils'

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Journal articles on the topic "Grain size groups and subgroups of soils"

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Wojtasik, Mieczysław, and Dawid Szatten. "Granulometryczny wskaźnik gęstości naturalnej gleb = Granulometric coefficient of natural bulk density of soil." Journal of Education, Health and Sport 5, no. 5 (2015): 76–85. https://doi.org/10.5281/zenodo.17444.

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<strong>Wojtasik Mieczysław, Szatten Dawid. </strong><strong>Granulometryczny wskaźnik gęstości naturalnej gleb = </strong><strong>Granulometric coefficient of natural bulk density of soil. </strong><strong>Journal of Education, Health and Sport. </strong><strong>2015;5(5):76-85. ISSN 2391-8306. DOI</strong> <strong>10.5281/zenodo.17444</strong> <strong>http://ojs.ukw.edu.pl/index.php/johs/article/view/2015%3B5%285%29%3A76-85</strong> <strong>https://pbn.nauka.gov.pl/works/559147</strong> <strong>http://dx.doi.org/10.5281/zenodo.17444</strong> <strong>Formerly Journal of Health Sciences. ISSN
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2

Liu, Dawei, Yuanzhi Zhang, Guangliang Zhang, et al. "An Empirical Model to Estimate Abundance of Nanophase Metallic Iron (npFe0) in Lunar Soils." Remote Sensing 12, no. 6 (2020): 1047. http://dx.doi.org/10.3390/rs12061047.

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Lunar soils gradually become mature when they are exposed to a space environment, and nanophase metallic iron (npFe0) generates within them. npFe0 significantly changes the optical properties of lunar soils and affects the interpretation of the remotely sensed data of the lunar surface. In this study, a correlation analysis was conducted between npFe0 abundance and reflectance spectra at short wavelengths for lunar soil samples in four size groups based on their spectral and compositional data, collected by the Lunar Soil Characterization Consortium (LSCC). Results show that 540 nm single scat
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Konechnaya, Olga, Sabine Lüchtrath, Larissa Dsikowitzky та Jan Schwarzbauer. "Optimized microplastic analysis based on size fractionation, density separation and μ-FTIR". Water Science and Technology 81, № 4 (2020): 834–44. http://dx.doi.org/10.2166/wst.2020.173.

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Abstract Microplastic particles have been recognized as global hazardous pollutants in the last few decades pointing to the importance of analyzing and monitoring microplastics, especially in soils and sediments. This study focused on a multi-step approach for microplastic analysis combining grain size fractionation, density separation and identification by μ-FTIR-spectroscopy. Eight widely used polymers (polyethylene (PE), polypropylene (PP), polyvinylchloride (PVC), polystyrol (PS), polyethylenterephthalate (PET), polymethylmethacrylate (PMMA), polyurethane (PU) and polyamide (PA)) were frac
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Dumbrovský, Miroslav, Lucie Larišová, Veronika Sobotková, and Martina Kulihová. "Comparison of Different Texture Analysis for Soil Erodibility Calculations of Loamy and Sandy‑Loam Soils in Moravian Regions." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 67, no. 2 (2019): 383–93. http://dx.doi.org/10.11118/actaun201967020383.

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The subject of this article is a comparison of results of soil texture analysis of loamy and sandy‑loam soils for soil erodibilty calculation using the Casagrande areometric method and results obtained by the laser diffraction method. A comparison was made of 27 samples taken from the Větřkovice locality, and 18 samples taken from the Hustopeče locality. On the basis of laboratory analysis of the soil samples, curves of grain composition were plotted, and the soils were divided into grain‑size groups according to the ratio of individual fractions. For comparison of the results, the soils’ regr
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Zec, Srdjan, Janko Cervenski, Aleksandra Savic, Dario Danojevic, Zarko Ilin, and Maja Ignjatov. "Variability of agronomic traits in vegetable pea (Pisum sativum L.) genotypes." Journal of Agricultural Sciences, Belgrade 69, no. 1 (2024): 95–109. http://dx.doi.org/10.2298/jas2401095z.

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In this study, a total of 12 vegetable pea genotypes of different growing seasons were subjected to phenotypic characterization. The vegetable pea genotypes are a part of the collection maintained at the Institute of Field and Vegetable Crops Novi Sad. The plant material included 10 promising lines and two released cultivars, Tamis and Dunav. The trial was carried out in 2022. It was set up at the Rimski Sancevi site, as a randomized block design in five replications. A total of 14 agronomic traits were analyzed. The obtained research results revealed divergence in the investigated plant mater
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Mohammed, Athraa Hashim, Asmaa Younus Yahya, and Balqees Abdulwahid Ahmed. "Database for Baghdad Soil Using GIS Techniques." Journal of Engineering 18, no. 12 (2012): 1307–24. http://dx.doi.org/10.31026/j.eng.2012.12.02.

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teen sites Baghdad are made. The sites are divided into two groups, one in Karkh and the other in Rusafa. Assessing the underground conditions can be occurred by drilling vertical holes called exploratory boring into the ground, obtaining soil (disturbed and undisturbed) samples, and testing these samples in a laboratory (civil engineering laboratory /University of Baghdad). From disturbed, the tests involved the grain size analysis and then classified the soil, Atterberg limit, chemical test (organic content, sulphate content, gypsum content and chloride content). From undisturbed samples, th
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Kilca, Ricardo de Vargas, Fabrício de Araújo Pedron, Gustavo Schwartz, Solon Jonas Longhi, and Gabriel Antônio Deobald. "Soil changes in a subtropical seasonal forest chronosequences in the south of Brazil." Ciência Rural 45, no. 12 (2015): 2174–80. http://dx.doi.org/10.1590/0103-8478cr20150035.

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ABSTRACT: The abandonment of field crops and the vegetation recovery in exhausted soils have been a recently studied subject as a way to assess the forest role on the soil recovering. The aim of this study was assess changes in the chemical(14 variables) and grain size (sand, silt, and clay) soil features in four forests chronosequences grew over abandoned field crops in the edge of the Brazilian Southern plateau, Rio Grande do Sul State. There were selected 25 forests aging from 5 to &gt;100 years old in areas of slopes and highlands where samples of Leptosols and Regosols were collected at 1
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Garcia-Gonzalez, M. T., J. Wierzchos, C. Vizcayno, and R. Rodriguez. "Fine-grained laminated Quaternary sediments in the Ebro Valley (Spain): characteristics and formation." Clay Minerals 31, no. 2 (1996): 173–81. http://dx.doi.org/10.1180/claymin.1996.031.2.03.

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AbstractFine-grained sediments are a major parent material in Ebro Valley soils. During the 1960s, the area was transformed by irrigation and soils underwent serious degradation processes. The sediments have a fine texture, high CaCO3 contents and high salinity-sodicity levels, and contain illite as the most important phyllosilicate in the fine fractions. Two groups of finely laminated organization have been recognized in terms of layer thickness and grain-size distribution. Based on texture, the microstructure of the silty and clayey layers is different, irrespective of their mode of formatio
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Du, Jun, Zhiming Xiong, Xinggang Shen, and Chenchen Li. "Experimental Study on the Effect of Coarse Grain Content on the Dilatancy and Particle Breakage Characteristics of Coarse-Grained Soils." Geofluids 2023 (April 25, 2023): 1–17. http://dx.doi.org/10.1155/2023/2307881.

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The dilatancy deformation and particle breakage effects of coarse-grained soil have a significant influence on the safety and stability of high earth and rock-fill dams. To study the shear deformation and particle breakage characteristics of coarse-grained soil, four groups of soil sample with different coarse grain contents were to conduct consolidated drained triaxial compression tests by DJSZ-150 large-scale triaxial compression test machine. The results showed that the volume of coarse-grained soil changes significantly under deviation stress. The soil samples underwent positive dilatancy
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10

Papazotos, P., O. Chalkiadaki, E. A. Chatzistamatiou, et al. "HEAVY METALS IN URBAN PARK SOILS FROM ATHENS, GREECE." Bulletin of the Geological Society of Greece 50, no. 4 (2017): 2251. http://dx.doi.org/10.12681/bgsg.14281.

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Urban geochemistry is a scientific discipline which is growing in the recent years mainly because of the environmental impact caused by urbanization. The present study aims to determine the concentrations of potentially harmful elements (PHEs) on surface soils (0-10cm) in Athens parks. Soil sampling was carried out in public park areas within the Athens urban area. Twenty surface soil (0-10cm) samples were collected and the &lt;100μm grain size fraction was analyzed by Flame Atomic Absorption Spectroscopy for Pb, Zn, Ni, Cu, Mn andCr after a strong acid dissolution and partial extraction by 1M
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