نتایج جستجو برای: loess soils

تعداد نتایج: 52082  

Journal: :Biology and Fertility of Soils 2021

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...

Journal: :Frontiers in Earth Science 2021

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...

2006
Yabin Li Jianhua Gong Dan Liu Weixing Wang Daojun Wang

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 ...

Journal: :Journal of the mechanical behavior of materials 2023

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...

Journal: :Acta IMEKO 2022

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...

Journal: : 2023

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....

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان - دانشکده مرتع و آبخیزداری و شیلات و محیط زیست 1386

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