نتایج جستجو برای: 85 topsoil samples 0

تعداد نتایج: 1035557  

2018
Gonzalo López-Abente Juan Locutura-Rupérez Pablo Fernández-Navarro Iván Martín-Méndez Alejandro Bel-Lan Olivier Núñez

The presence of toxic metals in soil per se, and in soil impacted by mining, industry, agriculture and urbanisation in particular, is a major concern for both human health and ecotoxicology. The dual aim of this study was: to ascertain whether topsoil composition could influence the spatial distribution of mortality due to different types of cancer and to identify possible errors committed by e...

2015
Dirk Goossens Brenda J. Buck Yuanxin Teng Brett T. McLaurin

Elevated concentrations of arsenic, up to 7058 μg g(-1) in topsoil and bedrock, and more than 0.03 μg m(-3) in air on a 2-week basis, were measured in the Nellis Dunes Recreation Area (NDRA), a very popular off-road area near Las Vegas, Nevada, USA. The elevated arsenic concentrations in the topsoil and bedrock are correlated to outcrops of yellow sandstone belonging to the Muddy Creek Formatio...

2016
A. S. Gregory J. A. J. Dungait C. W. Watts R. Bol E. R. Dixon R. P. White A. P. Whitmore

Soil organic carbon (SOC) and nitrogen (N) contents are controlled partly by plant inputs that can be manipulated in agricultural systems. Although SOC and N pools occur mainly in the topsoil (upper 0.30 m), there are often substantial pools in the subsoil that are commonly assumed to be stable. We tested the hypothesis that contrasting long-term management systems change the dynamics of SOC an...

Journal: :Plant and Soil 2021

Abstract Background About 30 % of vegetables in China are produced intensively managed greenhouses comprising flood irrigation and extreme rates nitrogen fertilizers. Little is known about denitrification N losses. Methods Soil were measured by the acetylene inhibition technique applied to anaerobically incubated soil samples. Four different greenhouse management systems differentiated: Convent...

Journal: :Ibn Al-Haitham Journal For Pure And Applied Science 2023

From 50 stool samples collected from children with diarrhea of both sexes who visited various hospitals in Baghdad, 26 isolates E.coli were found to belong the phylogenetic group E. The findings revealed that percentage for thephylogenetic E is (52%) , making it dominant among other groups. demonstrated 100% are resistant penicillin, and only 15% imipenem. Multi-drug resistance (MDR) was be 15%...

Journal: :Land 2021

The spatial distribution of potentially toxic elements in land near a heavily loaded highway the West Attica region (Greece) is discussed. This study aimed to investigate extent soil contamination with trace on margin highways. concentration thirty-five topsoil, car ash, and road sediment bulk samples was determined. Statistical analysis applied for evaluating geochemical dispersion examined el...

2005
E. Sentandreu L. Izquierdo

Juices from oranges, mandarins and hybrids were thermally treated in a plate exchanger at different conditions to evaluate the effects of treatment on fresh taste and on residual pectinmethylesterase (PME) activity. Freshness was significantly higher in fresh juices than in samples treated at 70°C or higher temperatures for 10 seconds of retention time, whereas no differences were found among s...

2014
Anja Schmithals Norbert Kühn Anil Shrestha

North American prairie vegetation has been a role model for designing highly attractive plantings for German urban green spaces for the past decade. In combination with gravel mulch top layers on planting sites and non-selective maintenance techniques like mowing or burning, prairie plantings are considered to be cost-effective and low-maintenance. This study was undertaken to assess the impact...

2014
Iris M. Kawauchi Nilva K. Sakomura Cristiana F. F. Pontieri Aline Rebelato Thaila C. Putarov Euclides B. Malheiros Márcia de O. S. Gomes Carlos Castrillo Aulus C. Carciofi

Animal by-product meals have large variability in crude protein (CP) content and digestibility. In vivo digestibility procedures are precise but laborious, and in vitro methods could be an alternative to evaluate and classify these ingredients. The present study reports prediction equations to estimate the CP digestibility of meat and bone meal (MBM) and poultry by-product meal (PM) using the p...

2011
S. FENG S. TAN A. ZHANG Q. ZHANG G. PAN F. QU P. SMITH L. LI X. ZHANG

An inventory of topsoil soil organic carbon (SOC) content in household farms was performed in a village from a red earth region in Jiangxi Province, China in 2003. In this region, the farmland managed by each household is fragmented, consisting of several plots of land that are not necessarily adjacent to each other. A statistical analysis of SOC variation with land use and household management...

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