نتایج جستجو برای: topsoil contamination

تعداد نتایج: 54660  

1997
Johannes Lehmann Inka Peter Claudia Steglich Gerhard Gebauer Bernd Huwe Wolfgang Zech

This paper discusses the effects of intercropping and tree pruning on root distribution and soil water depletion in an alley cropping system with Acacia saligna and Sorghum bicolor in northern Kenya. Root distribution was determined by destructive sampling, and the soil water suction was measured with tensiometers and gypsum blocks, both up to 150 cm depth. The root systems of the intercropped ...

Journal: :PloS one 2016
Jian Deng Pingsheng Sun Fazhu Zhao Xinhui Han Gaihe Yang Yongzhong Feng Guangxin Ren

Artificial vegetation restoration can induce variations in accumulation and distribution of soil carbon (C), nitrogen (N) and phosphorus (P). However, little is known about variations in soil C, N and P nutrient fraction stratification following artificial vegetation in Loess Plateau China. Based on the hypothesis that re-vegetated can improve soil quality and stratification ratios (SR) can be ...

Journal: :Agronomy 2021

The aim of this study was to characterize the impact soda ash manufacturing on magnetic properties soils located in agricultural landscape north-central Poland. Two sites were chosen: Mątwy (SM) and Janikowo (SJ). Highly saline with halophyte communities selected order develop an understanding relationship between salinization water–soil interface potential contamination risk environment. Basic...

Journal: :Nepal Journal of Environmental Science 2021

The study attempted to assess the impacts of brick kilns emissions on farm soil in and around kiln areas. A total 72 representative samples were collected from 12 selected clusters Rajshahi Gazipur Districts Bangladesh, covering two years (September 2015 August 2017). analyzed using standard methods. pH organic matter content found be very low. parameters such as pH, matter, texture critical co...

Journal: :PDA journal of pharmaceutical science and technology 2005
Richard L Friedman

This paper summarizes parenteral drug contamination case studies presented at industry conferences and a Food and Drug Administration advisory committee meeting in the period of 2000-2004. CGMP deficiencies associated with each contamination event are discussed. The key role of a well-functioning quality system in contamination prevention is emphasized.

2011
R. Fieuzal

The objective of this study is to get a better understanding of radar signal over irrigated wheat fields and to assess the potentialities of radar observations for the monitoring of soil moisture. Emphasis is put on the use of high spatial and temporal resolution satellite data (Envisat/ASAR and Formosat-2). Time series of images were collected over the Yaqui irrigated area (Mexico) throughout ...

Journal: :The Science of the total environment 2015
Jessica L Adams Edward Tipping Charlotte L Bryant Rachel C Helliwell Hannah Toberman John Quinton

The riverine transport of particulate organic matter (POM) is a significant flux in the carbon cycle, and affects macronutrients and contaminants. We used radiocarbon to characterise POM at 9 riverine sites of four UK catchments (Avon, Conwy, Dee, Ribble) over a one-year period. High-discharge samples were collected on three or four occasions at each site. Suspended particulate matter (SPM) was...

Journal: :Carbon Balance and Management 2006
Peter R Grace Wilfred M Post Kevin Hennessy

BACKGROUND Soil organic carbon (SOC) represents a significant pool of carbon within the biosphere. Climatic shifts in temperature and precipitation have a major influence on the decomposition and amount of SOC stored within an ecosystem and that released into the atmosphere. We have linked net primary production (NPP) algorithms, which include the impact of enhanced atmospheric CO2 on plant gro...

روان خواه, ندا, معصوم, سعید, میرزایی, روح اله,

Background and purpose: Soil heavy metal contamination is a major environmental concern. Contaminants in urban soils can directly pose significant human health risks through oral ingestion, particle inhalation, and dermal contact. The purpose of this study was to determine the health risk of heavy metals in surface soils in Aran-Bidgol, Iran. Materials and methods: A descriptive cross-sectio...

Journal: :Journal of environmental quality 2002
Chun Man Lee Xue Rui Lin Chong Yu Lan Samuel Chun Lap Lo Gilbert Yuk Sing Chan

Landfill leachate recirculation is efficient in reducing the leachate quantity handled by a leachate treatment plant. However, after land application of leachate, nitrification and denitrification of the ammoniacal N becomes possible and the greenhouse gas nitrous oxide (N2O) is produced. Lack of information on the effects of leachate recirculation on N2O production led to a field study being c...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید