نتایج جستجو برای: loess soils
تعداد نتایج: 52082 فیلتر نتایج به سال:
Abstract Soil microbial C:N:P stoichiometry and maintenance respiration (i.e. metabolic quotient, qCO 2 ) were monitored along a nutrient gradient in soils from 52-year space-for-time chronosequence of reclaimed agricultural land after brown-coal mining. Land reclamation produced loess initially low (0.2%) SOC. Consecutive management led to gradual recovery SOC contents. Our data revealed sudde...
Paleoclimatic investigation of loess-paleosol sequences from northern Iran is important for understanding past changes in a region highly sensitive to shifts precipitation, and along potential routes human migration. Here, we present carbon oxygen isotopic compositions bulk carbonate (? 13 C bc ? 18 O , respectively) coupled with particle size distributions samples the Mobarakabad section, Iran...
Two methods of grid based and image based modeling were put forward respectively to represent the landform of watersheds on the Loess Plateau, China. Many kinds of spatial data such as Digital Elevation Model (DEM), Remote Sensing (RS) images, and photos are utilized to establish the digital 3-D terrains of watersheds on the Loess Plateau, which provides 3-D virtual geographic environments for ...
Abstract Collapsible soils are almost found in unsaturated states and involved significant engineering problems. Geotechnical challenges of such represented by the hydro-mechanical behaviour during wetting–drying cycles due to humidity climate conditions. The main objective this paper is investigate soil–water characteristic curve (SWCC) collapsible soils. In study, three types were investigate...
The research presented in this paper focused on the preliminary non- and semi-destructive analysis of copper alloys, corrosion, soil components from a Roman archaeological site Israel. Investigations using portable X-ray fluorescence, diffraction scanning electron microscopy with energy dispersive spectroscopy as well micromorphological analyses were carried out to gain better understanding cor...
A set of data for eight soil varieties are considered using the spectrum properties included into program fundamental research genetic science. To expand our understanding essence formation and nature, sustainable land use principles, we studied autochonous moistening soils developed on loess-like loams as a basis diagnosis their genesis diversity. It is found that differ from soil-like bodies....
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