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To date, a soil is classified contaminated when metal concentrations in its bulk horizons exceed baseline values taken as higher limits for non-contaminated soils. Such a pedological approach underestimates the influence of weathering microsystems which operate at micrometer scale in soil horizons and play a major role in the sorption of metals onto their specific newly formed clay minerals. This...
To evaluate the effect of crop residue burning of agriculturally tilled soils, the soil's sorption of polycyclic aromatic hydrocarbons (PAHs) is studied using naphthalene as a representative model contaminant in the soil.Soils from agriculturally tilled fields (Dorobantu farm, Calarasi, Romania), either burned or unburned for clearance, were examined for their toxicity and sorption capacity (fields...
Arsenic is a highly toxic element and its presence in foodstuffs will do harm to human health. In this study, the levels of arsenic in the fruits of three mango cultivars (Mangifera indica L.) from Hainan Island, China were investigated and their relationships to soil properties were discussed. The concentrations of arsenic in the mango fruits ranged from 0.6 to 50μgkg −1 (FW) with a mean...
The Dry-hot Valley of the Jinsha River in southwest China is an ecologically fragile zone in which gully erosion is one of the most important environmental problems due to the high sediment yield from the gully. The vegetation, which impacts the erosion processes of the gully, is important to the ecological environment. In this study, we investigated the vegetation in gully n1 of Yuanmou County, which...
The loss of fertile soil from agricultural areas in Norway is especially harmful because of the thin layer of nutrient rich soil and the limited space where agriculture is possible. Physically based soil erosion prediction models have proved to be good tools to simulate and quantify soil erosion, but are not well established in Norway yet. Due to that this study was undertaken to further improve the...
The soil carbon reservoir is the largest carbon reservoir in terrestrial ecosystems and consists of soil organic and inorganic carbon stocks. Previous studies have mainly focused on the soil organic carbon (SOC) stock, and limited information is available about the soil inorganic carbon (SIC) stock. The Chinese Loess Plateau (CLP), which is located in the arid and semi-arid region of China, is an...
This study aims to quantify changes in flow and transport parameters induced by the addition of zeolites in a silty-clay soil. Hydraulic and physical processes governing solute transport under variably saturated flow conditions were studied in a laboratory scale analog model (AM) irrigated with canal water for seven weeks. One plot of the AM was fertilized with 270kg-N/ha of urea while the other plot...
The uptake of cadmium (Cd) was analyzed for six different perennial plant species growing in a wooded pasture of the Swiss Jura Mountains, where the soils are geogenically enriched in Cd (4.58mg·kg −1 on average (n=36); maximal value: 16.3mg·kg −1 ). The six selected plants — Hypericum maculatum (Hypericaceae), Alchemilla xanthochlora (Rosaceae), Cynosurus cristatus (Poaceae), Ranunculus...
Mineralogical and geochemical analyses were performed on six closely spaced (within a perimeter of 300m) soil profiles, which are naturally enriched in cadmium (Cd) at Le Gurnigel, Swiss Jura Mountains. The soils consist of Cambisols and Cambic Luvisols, the latter including an important allochthonous, aeolian fraction (loess). All soils are associated with bedrock composed of middle Jurassic (Bajocian)...
This research employs a raft of incisive strategies and technologies to define and interpret spatial relationships between native plant ecosystems and classes of soil across a range of scales. Building on traditional vegetation zonings and soil mappings, information on locations of key taxa, chemical composition of pisoliths and radiometric based technologies are used collectively to identify and...
Soil salinization is a relatively common form of soil degradation in Europe threatening coastal areas and fertile lowlands and altering the long-term interplay between natural and human factors at the local scale. While rural areas with degraded soils are often characterized by poverty, unemployment and subsidence agriculture, less information is available on the relationship between soil salinization...
Analyzing meteoric 10 Be in soil profiles along with soil measurements such as pedogenic Fe and clay content permits better understanding of meteoric 10 Be transport in soils, soil formation, and hillslope geomorphology. This study presents meteoric 10 Be depth profiles from saprolite-derived soil catenas sampled in the Gordon Gulch catchment, Colorado Front Range and from...
We investigated properties of soil materials derived from reclamation and revegetation on fly ash used to fill-in an area excavated during earlier mining. Changes in the soil environment that take place after this practice have to be well recognized, since knowledge of all aspects of fly ash revegetation is essential to sustainable reclamation. Fly ash was a by-product of lignite-burning in an electric...
The objective of this study was to explore the correlations between Tamarix and soil water salinity parameters and groundwater depth under saline mineralization conditions and to reveal the transport rules and exchange effects of salinity in soil-Tamarix systems with different groundwater depths. Soil columns planted with Tamarix chinensis (T.-soil column) grown in the Yellow River Delta were chosen...
Multi-metal pollution in mines and their surrounding areas causes major environmental and health problems. An investigation on the soil quality in four mining sites revealed serious heavy metal (HM) contamination. The contents of As, Pb, Zn, Cd, Cu, and Sb showed high HM pollution. Compared with the national second soil environmental quality standard, the over-standard rates of As, Pb, Zn, Cd, Cu,...
We investigated properties of soil materials derived from reclamation and revegetation on fly ash used to fill-in an area excavated during earlier mining. Changes in the soil environment that take place after this practice have to be well recognized, since knowledge of all aspects of fly ash revegetation is essential to sustainable reclamation. Fly ash was a by-product of lignite-burning in an electric...
Soil evolution and the development of surface and subsurface diagnostic horizons affects hydrologic partitioning of precipitation to infiltration and runoff, and the vegetative carrying capacity of landscapes, all of which affect rates of hillslope erosion. Rates of erosion, in turn, feedback on soil development by removing or preserving soil horizons. This coevolution is difficult to investigate...
Heavy metal contamination of agricultural soils is a severe cause of concern globally. The heavy metals can enter crops through roots and can result in biomagnification in the different plant tissues such as roots, stems and leaves. From plants these metals are transferred into animal and human systems resulting in serious health problems. Various physical and chemical methods are available for heavy...
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