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Wyszukujesz frazę "soils" wg kryterium: Temat


Artykuł
Tytuł:
Low-strength substrates and anthropogenic soils in transportation engineering
Autorzy:
Batog, A.
Stilger-Szydło, E.
Tematy:
transport engineering
road embankments
soft soils
anthropogenic soils
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Data publikacji:
2018
Powiązania:
https://bibliotekanauki.pl/articles/178591.pdf  Link otwiera się w nowym oknie
Źródło:
Studia Geotechnica et Mechanica; 2018, 40, 4; 292-299
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Opis:
Road embankments, especially their slopes’ surfaces, must fulfil all the requirements concerning the exploitation criteria after the completion of construction works. This is very important while constructing or modernizing the embankments, based on the substrate including low-strength soils as well as in simple ground conditions (most convenient). The last dozen or so years of intensive construction of transport infrastructure have shown how big is the problem of ensuring the required volumes of qualified soil material for the construction of road embankments or the modernization of railway embankments. The depleting deposits of natural and easily accessible soils for the construction of embankments result in the need to use anthropogenic soils, for example, in the form of aggregates from the recycling of construction waste and other locally available waste materials, usually in the form of slag and ashes from the combined heat and power plants. In such cases, there’s a need to treat transportation earth structures individually in the scope of designing and quality control, because there are no applicable standard provisions in this scope. This work indicates some of these important contemporary problems of transport engineering, occurring in newly built and modernized road objects, such as the stability of road embankments based on a low-strength substrate, use of anthropogenic soils and materials originating from the recycling of concrete surfaces for the construction of road embankments.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Digital Terrain Model Derivatives Analysis with the Aim of Identifying Specific Soil Types in Young Post-Glacial Topography with a Vector Approach
Autorzy:
Radło-Kulisiewicz, Małgorzata
Tematy:
DTM derivatives
soils made of sand
soils made of loam
wet-soils
digital soil mapping
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Data publikacji:
2021
Powiązania:
https://bibliotekanauki.pl/articles/2088179.pdf  Link otwiera się w nowym oknie
Źródło:
Polish Journal of Soil Science; 2021, 54, 1; 123-138
0079-2985
Pojawia się w:
Polish Journal of Soil Science
Opis:
This article discusses a study conducted in order to analyse selected Digital Terrain Model (DTM) derivates in  diverse young post-glacial topographic profiles  with the aim of identifying terrain features that could be related to the soils that formed there. The area under investigation is within the reach of the youngest Vistulian Glaciation, in the north-east of Poland. The main goal of the study was to reveal indirect relationships between a lithological soil type and terrain forms, which transpire from DTM derivatives. This can directly help to assign the type of soil in the area to one of the three soil types: a) made of sand, b) made of loam, c) wet-soils. The starting point for the research undertaken was the landscape approach to soil modelling and the article deals with medium scales. Derivatives were analysed using vector data notation, focusing on selected derivative values and their spatial location in relation to one another. The results obtained indicate the possibility of using this approach as an auxiliary approach in soil mapping of areas for which the quality of source materials (such as precipitation geometry) is low. Thus, they can be of assistance in improving the existing soil maps of selected scales. The trend revealed in the obtained results of DTM analysis can be considered as a contribution to realisation of assumptions of a study in digital soil mapping with the use of selected methods of AI.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular and Morphological Snapshot Characterisation of the Protist Communities in Contrasting Alpine Glacier Forefields
Autorzy:
LAZZARO, Anna
RISSE-BUHL, Ute
BRANKATSCHK, Robert
Tematy:
Ciliates, flagellates, testate amoebae, deglaciated soils, bedrock geology, siliceous soils, calcareous soils, vegetation cover
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Data publikacji:
2015
Powiązania:
https://bibliotekanauki.pl/articles/763660.pdf  Link otwiera się w nowym oknie
Źródło:
Acta Protozoologica; 2015, 54, 2
1689-0027
Pojawia się w:
Acta Protozoologica
Opis:
Phagotrophic protist diversity in oligotrophic soils such as alpine glacier forefields is still poorly studied. Combining morphologic observations with molecular-based analyses, we assessed the diversity of major phagotrophic protist groups in two contrasting glacier forefields in the Swiss Alps (Tiefen glacier forefield, siliceous bedrock, and Wildstrubel glacier forefield, calcareous bedrock), at sites differing in soil development. Ciliates and heterotrophic flagellates could be detected with both approaches, while amoebae could be observed only microscopically. Soils from Tiefen and Wildstrubel glacier forefields harboured distinctly different ciliate, flagellate and amoebae communities. The ciliate clone libraries from the Tiefen glacier forefield were dominated by Oligohymenophorea-related sequences while those from the Wildstrubel glacier forefield were dominated by Spirotrichea-related sequences. Testate amoebae morphospecies of the genera Corythion, Cryptodifflugia, Euglypha and Tracheleuglypha were restricted to the Tiefen glacier forefield, while Centropyxis and Trinema to the Wildstrubel one. No ciliate sequences and only a few ciliate and testate amoebae morphospecies could be retrieved from unvegetated soils of both glacier forefields. The ciliate and testate amoebae community detected at unvegetated sites were a subset of the community developed at vegetated sites. Overall, our results suggest that alpine glacier forefields are colonised by a diverse community of phagotrophic protists which seems to be shaped by bedrock geology and vegetation cover.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biochemical Traits and Biological Assessment of Indigenous Biofilm-Forming Rhizophosphate Bacteria Isolated from Salinity and Acidity Stressed Soils to Enhance Maize Growth
Autorzy:
Ambarita, Debora Dellaocto Melati
Mora, Elisabeth
Fitriatin, Betty Natalie
Ruswandi, Dedi
Simarmata, Tualar
Tematy:
biofilm rhizophosphate biofertilizer
BFRB
biofilm forming rhizophosphate bacteria
saline soils
marginal soils
acid soils
salinity
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Data publikacji:
2024
Powiązania:
https://bibliotekanauki.pl/articles/59114335.pdf  Link otwiera się w nowym oknie
Źródło:
Journal of Ecological Engineering; 2024, 25, 9; 328-339
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Opis:
Soil acidity and salinity stress significantly affect nutrient availability and uptake, as well as the growth, development, and yield of maize plants. This research aimed to screen, characterize, and assess the ability of selected indigenous biofilm-forming rhizophosphate bacteria (BFRB) to produce growth factor and promote maize growth. Soil samples were collected from both acid ecosystems (AE) and saline ecosystems (SE). Thirty isolates of rhizophosphate bacteria were obtained based on the clear zone around colonies on selective Pikovskaya agar media. Subsequently, a qualitative biofilm test was conducted, resulting in the identification of 9 isolates of biofilm-forming rhizophosphate bacteria. Biochemical test was performed to asses phosphate solubility index (PSI) and production of indole acetic acid (IAA) and biological assays was performed to measure the effect of selected BFRB on maize growth characteristics. The experiment was arranged in a randomized block design with 10 treatments (control and 9 isolates of BFRB) and 3 replications. The findings revealed that all isolate has avaibility to membentuk biofilm dan mampu melarutkan P. three potential isolates of BFRB from both AE and SE significantly enhanced maize growth. Isolates PS-03, PN-05, and PC-04 from saline soils, as well as isolates NA-01, NG-04, and NF-04 from acid land, exhibited notable increases in root length, plant height, and dry weight compared to the control. For instance, isolates PS-03, PN-05, and PC-04 from saline soils increased maize height by 2160.87% and root length by 392.64%, and they also increased the dry weight of the plants by 20.50%. Similarly, isolates NA-01, NG-04, and NF-04 from acid soil increased maize height by 673.82% and root length by 220.29%, and they increased the dry weight of the plants by 12.57%. These findings suggest that these BFRB isolates hold significant potential for developing rhizophosphate biofilm biofertilizers to enhance maize productivity in marginal soils. Additionally, each of these bacteria produced IPF and IAA, which contributed to the significant increases in plant height and root length, and formed biofilms that were present on the roots of the maize plants. Therefore, field trials are necessary to utilize these biophosphate fertilizers to improve fertilization efficiency and maize productivity in saline and acidic ecosystems.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the Głogów copper works on the content of mobile forms of copper and zinc in arable soils
Wpływ Huty Miedzi Głogów na zawartość mobilnych form miedzi i cynku w okolicznych glebach uprawnych
Autorzy:
Jaworska, H.
Dabkowska-Naskret, H.
Tematy:
soils
copper
zinc
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Data publikacji:
2012
Powiązania:
https://bibliotekanauki.pl/articles/1188028.pdf  Link otwiera się w nowym oknie
Źródło:
Journal of Elementology; 2012, 17, 1; 57-66
1644-2296
Pojawia się w:
Journal of Elementology
Opis:
Celem badań była ocena wpływu Huty Miedzi Głogów na profilową dystrybucję oraz mobilność miedzi i cynku w okolicznych glebach uprawnych. Materiał badawczy stanowiły profile glebowe położone w odległości 5,7-6,8 km w kierunku południowo-wschodnim od emitora. W próbkach glebowych pochodzących z 4 profili gleb uprawnych sklasyfikowanych jako gleby płowe typowe oznaczono: uziarnienie, pH KCl (1 mol dm- 3 ) i pH w H2O, C-organiczny oraz całkowitą zawartość Cu i Zn metodą ASA po mineralizacji w kwasach HF i HClO4, a zawartość form mobilnych Cu i Zn metodą analizy sekwencyjnej. Pod względem uziarnienia badane profile zaliczono do pyłów gliniastych. W badanych glebach pH było w zakresie pHH o 7,33-8,55 oraz pHKCl 5,81-7,75, przyjmując najniższe wartości w poziomach Bt. Stwierdzono obecność węglanu wapnia, oprcz profilu (P1), którego zawartość wynosiła 0,43%-11,60%. Najzasobniejsze w CaCOg były poziomy C oraz poziomy Bt. Zawartość C-organicznego w poziomach próchnicznych wynosiła 7,0-18,1 g kg- 1 , całkowita zawartość Cu 4,04-57,75 mg kg- 1 . Stwierdzono wyraźnie wyższą całkowitą zawartość Cu w poziomach Ap oraz najniższą w poziomach C, co wskazuje na antropogeniczne wzbogacenie poziomów Ap w Cu. Wyniki analizy sekwencyjnej wskazują na dominujący udział w poziomach powierzchniowych frakcji V, tj. form związanych z materią organiczną, w pozostałych poziomach przeważa frakcja Cu związana z tlenkami żelaza. Całkowita zawartość Zn wynosiła 3,34-42,65 mg kg- 1 , a najwyższą zawartość tego pierwiastka stwierdzono w poziomach Ap, najniższą w poziomach Eet. Analiza specjacyjna wykazała najwiekszą zawartość Zn w formie związanej z krystalicznymi tlenkami żelaza (frakcja VI), a najniższą we frakcji I i II, tj. w formach wodnorozpuszczalnych i wymiennych. Badane gleby w większości (oprócz profilu P1) można zaklasyfikować do gleb niezanieczyszczonych Cu i Zn, co wskazuje, że bliskość Huty Głogów (oprócz jednego przypadku) nie eliminuje badanych gleb z użytkowania rolniczego.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy Metals in Soils
Autorzy:
Draszawka-Bołzan, Beata
Tematy:
heavy metals
soils
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Data publikacji:
2015
Powiązania:
https://bibliotekanauki.pl/articles/1153848.pdf  Link otwiera się w nowym oknie
Źródło:
World News of Natural Sciences; 2015, 2; 20-37
2543-5426
Pojawia się w:
World News of Natural Sciences
Opis:
For the purposes of this Issue Paper, metals most commonly found at Superfund sites will be discussed in terms of the processes affecting their behavior in soils, as well as in those of the laboratory methods available to evaluate this behavior. The retention capacity of soil will also be discussed with regard to the movement of metals between the other environmental compartments: ground water, surface water, or the atmosphere. Long-term changes in soil environmental conditions, due to the effects of remediation systems or to natural weathering processes, are also explained with respect to the enhanced mobility of metals in soils.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of moisture, redox potentia land oxygen diffusion rate of some soils from Calypsostranda, Spitsbergen
Autorzy:
Melke, Jerzy
Uziak, Stanisław
Tematy:
Arctic
Spitsbergen
soils
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Data publikacji:
1989
Powiązania:
https://bibliotekanauki.pl/articles/2053156.pdf  Link otwiera się w nowym oknie
Źródło:
Polish Polar Research; 1989, 10, 1; 91-104
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł

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