نتایج جستجو برای: lithological soil types

تعداد نتایج: 660935  

Journal: :Environmental science and pollution research international 2011
Lingqing Wang Tao Liang Zhongyi Chong Chaosheng Zhang

INTRODUCTION Through leaching experiments and simulated rainfall experiments, characteristics of vertical leaching of exogenous rare earth elements (REEs) and phosphorus (P) and their losses with surface runoff during simulated rainfall in different types of soils (terra nera soil, cinnamon soil, red soil, loess soil, and purple soil) were investigated. RESULTS AND ANALYSES Results of the lea...

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2016
M. Sirajul Islam Zahid Hayat Mahmud M. Shafiqul Islam Ganesh Chandra Saha Anwar Zahid AHM Zulfiquar Ali M. Qumrul Hassan Khairul Islam Hasin Jahan Yakub Hossain M. Masud Hasan Sandy Cairncross Richard Carter Stephen P. Luby Alejandro Cravioto Hubert Ph. Endtz Shah M. Faruque John D. Clemens

BACKGROUND Groundwater drawn from shallow tubewells in Bangladesh is often polluted by nearby pit latrines, which are commonly used toilets in rural and sub-urban areas of the country. METHODS To determine the minimum safe distance of a tubewell from a pit latrine in different hydrogeological conditions of Bangladesh, 20 monitoring wells were installed at three study sites (Manda, Mohanpur an...

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2015
L. Ma C. Guo X. Lü S. Yuan R. Wang

Global environmental factors impact soil microbial communities and further affect organic matter decomposition, nutrient cycling and vegetation dynamic. However, little is known about the relative contributions of climate factors, soil properties, vegetation types, land management practices and spatial structure (which serves as a proxy for underlying effects of temperature and precipitation fo...

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Journal: :journal of agricultural science and technology 2010
h. asadi h. rouhipour h. gh. rafahi h. ghadiri

hairsine and rose (1991) developed a process-based soil erosion model which described the erosion transport of multiparticle sizes in sediment for rain-impacted flow in the absence of entrainment in overland flow. in order to test this model laboratory experiments were carried out in a detachment tray using simulated rainfall. three contrasting soil types were subjected to simulated rainfall at...

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Journal: :Sensors 2019

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2011
C. A. Quesada J. Lloyd L. O. Anderson N. M. Fyllas C. I. Czimczik

The tropical forests of the Amazon Basin occur on a wide variety of different soil types reflecting a rich diversity of geologic origins and geomorphic processes. We here review the existing literature about the main soil groups of Amazonia, describing their genesis, geographical patterns and principal chemical, physical and morphologic characteristics. Original data is also presented, with pro...

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2008
M. Mira

The influence of soil moisture in thermal infrared emissivity is a known fact, but poorly studied in the past. An experiment for quantifying the dependence of emissivity on soil moisture has been designed. Six samples of superficial horizons of different Mediterranean soil types have been selected. Their emissivity has been measured at different soil water contents, using the twolid variant of ...

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Journal: :The Science of the total environment 2014
Y Agnan N Séjalon-Delmas A Probst

Rare earth elements (REE) are known to be powerful environmental tracers in natural biogeochemical compartments. In this study, the atmospheric deposition of REE was investigated using various lichens and mosses as well as herbarium samples from 1870 to 1998 from six major forested areas in France. The comparison between the REE distribution patterns in organisms and bedrocks showed a regional ...

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Journal: :Academic journal of computing & information science 2022

Map of geological cross section is the most intuitive expression strata in vertical direction. Realizing automatic filling lithologic patterns and reflecting changes stratum curvature are important contents map drawing. The traditional pattern method can not show change rock dip angle. To solve this problem, an algorithm drawing based on arc fitting proposed. By analyzing mathematical relations...

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2008
Christian L. Lauber Michael S. Strickland Mark A. Bradford Noah Fierer Christian Lauber

Land-use change can have significant impacts on soil conditions and microbial communities are likely to respond to these changes. However, such responses are poorly characterized as few studies have examined how specific changes in edaphic characteristics do, or do not, influence the composition of soil bacterial and fungal communities across land-use types. Soil samples were collected from fou...

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