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Wyszukujesz frazę "geochemical" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Stratigraphic and geochemical differentiation of organogenic sediments in the river valley of Ciemiega as a result of anthropogenic alterations in the area of the river basin in the Holocene
Autorzy:
Borowiec, J
Urban, D.
Powiązania:
https://bibliotekanauki.pl/articles/1450833.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
loess area
organogenic sediment
Holocene
river valley
soil
sediment stratigraphy
geochemical differentiation
Lublin Upland
terrestrial ecosystem
Ciemiega River
Opis:
Anthropogenic alterations of the recent millennia of our era, in the loess areas of the Lublin Upland are clearly visible in the composition and character of the sediments that fill river valleys. This paper is an attempt to review this issue on the example of a small river valley that runs through the loess relief regions near Lublin. Samples were taken from deep drilling (up to 6 m) in the three cross-sections of the valley (Ożarów, Jastków, Snopków). A total of 172 samples taken from 5 drillings were investigated. The results obtained allow to conclude that delluvial processes dominated in the course of sediment formation that filled the Ciemięga river valley. Those delluvial processes started in the Neolyth by climatic changes and cutting down forests for the incoming agriculture - and have been intensified since the Middle Ages up till now. It is seen in a clear correlation between the growing part of ash components and mineral interbeddings in the peat deposits, as well as in the presence of cereal grains and weed pollen from cultivated fields in the investigated samples. In the chemical composition of the sediments, anthropogenic enrichment of K, P, Fe, Mn, Pb, Cr, Cu, Zn, and Co is observed.
Źródło:
Acta Agrophysica; 2001, 50; 29-40
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Content of Cu, Zn and Mn in the eroded soils of a small arable-forest catchment of West Pomerania [The Chojna District]
Autorzy:
Chudecka, J
Powiązania:
https://bibliotekanauki.pl/articles/1449154.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
Pomeranian region
Polska
arable-forest catchment
water erosion
Chojna district
erosion process
geochemical background
soil
soil property
eroded soil
degraded ecosystem
anthropogenic ecosystem
heavy metal
Opis:
The aim of this paper was to assess differentiation in the total content of Cu, Zn and Mn under the influence of water erosion. The present author investigated parent material, eroded soils and delluvial sediments of a small arable-forest catchment of the moraine zone in West Pomerania. The average content of heavy metals in the parent rock (boulder light loam) were assumed as geochemical backgrounds of Cu, Zn and Mn. It was found out that erosion process caused differentiation in heavy metals. Zinc was the most mobile in this transportation; Mn was not sensitive to it. Delluvial sediments from arable (drainage) depressions had a clearly lower content of Cu and Zn than the parent material. It was also noted that Cu and Zn content in the forest area was lower than in the arable area of a similar relief and soil composition. Mn content was always higher in the arable soils. Soil-forming processes influenced differentiation of heavy metals in the vertical soil profile. The humus and Bt horizons (accumulation of silicate clay) were enriched with heavy metals. A decrease of heavy metal content was noticed in the eluvial horizon (Eet - outwash of silicate clay). The humus horizon of the investigated soil had, a natural (not increased) content of Cu, Zn and Mn.
Źródło:
Acta Agrophysica; 2001, 51; 21-28
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of the general aspect of Polish lawn grass varieties on mineral soil with mechanically damaged upper layer
Autorzy:
Harkot, W
Czarnecki, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1450195.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
chemical deformation
lawn
Polska
lawn grass
hydrological deformation
mineral soil
mechanically deformed soil
geochemical deformation
soil
soil property
vegetation period
degraded ecosystem
anthropogenic ecosystem
city agglomeration
Opis:
Research carried out on mineral soil with mechanically damaged upper layer proved greater variability of general aspect between species than between varieties within a species. Among the investigated species, the following had higher general aspect values during the whole research period: Festuca ovina, Festuca rubra, and Lolium perenne; while Agrostis capillaris and Agrostis canina had lower values. Significant differentiation of the general aspect evaluations were observed only in Festuca genera variations, whereas evaluations of the general aspect of variations within the rest of the species were close. Sowing time did not significantly affect di fferentiation in the evaluation of the general aspect of varieties in Agrostis, Poa, and Lolium genera. However, spring sowing positively affected the general aspect of the Festuca ovina varieties and the Terros variety (F. arundinacea).
Źródło:
Acta Agrophysica; 2001, 51; 71-76
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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