نتایج جستجو برای: 100 m2 soil samples were taken from 0

تعداد نتایج: 7674154  

ژورنال: علوم آب و خاک 2001
افیونی, مجید , مصدقی, محمدرضا ,

Tillage system effect, Conventional (CT) vs. No-Till (NT), on soil physical properties and Br transport was studied at two locations in North Carolina. The soil types were a Typic Paleudults at Coastal Plain (site 1) and a Typic Kanhapludults at Piedmont (site 2). Bulk density (BD), total porosity (TP), macroporosity (MP), and saturated hydraulic conductivity (Ks) .were measured in plant row (R...

2010
JACEK KAMCZYC DARIUSZ J. GWIAZDOWICZ

The species composition of mesostigmatid mites in the soil and leaf litter was studied on the Szczeliniec Wielki plateau, which is spatially isolated from similar rocky habitats. A total of 1080 soil samples were taken from June 2004 to September 2005. The samples, including the organic horizon from the herb layer and litter from rock cracks, were collected using steel cylinders (area 40 cm2, d...

2009
Yacoub Batta Nader Sadeq

Soil samples were collected from ten different locations of the Western Jordan Valley (W. J. V.) extending from Pardala (north) to Jericho city (south). The residues of Endosulfan which is the most widely used insecticides in the W. J. V. were detected using Gas Chromatography/ Mass Spectrometry (GC/ MS). The soil samples were collected from two depth levels namely 0-30 and 30-60 cm. The correl...

Journal: :journal of rangeland science 0
mehdi moameri assistant professor, university of mohaghegh ardabili, ardabil, iran mohammad jafari university of tehran ali tavili university of tehran babak motasharezadeh university of tehran mohammad ali zare chahuoki university of tehran

there are many remediating methods for the polluted soils but only phytoremediation is a cost effective, environmental friendly, aesthetically pleasing approach that is most suitable for many countries. the purpose of this study was to investigate the potential of native plants for phytoremediation of contaminated soils with lead, zinc, cadmium and nickel in the rangelands around national lead ...

خادمی, حسین, دهقان, رمضانعلی , شریعتمداری, حسین ,

  Studying soil phosphorus fractions is useful in understanding soil pedogenesis as well as soil fertility. In this reseach, 20 soil samples were taken from different depths of 0-30 and 30-60 cm of upper-slope, mid-slope and lower-slope positions of four toposequences in arid (Jei and Ziar in Isfahan) and semiarid (Farokhshahr and Shahrekord) regions. In each toposequence, the soil depth was re...

Mohammad Ali Adibi Mohammad Jafari Mohammad Zadbar Seyed Akbar Javadi Somayeh Naseri

One of the ordinary methods to protect, rehabilitate, and enhance an ecosystemfunction in arid and semi-arid areas of the world is sand dune stabilization using biologicalpractices. Plantation of species on the soil plays a great role in sustainable management ofthe ecosystem. This research studies the effects of cultivation of Haloxylon ammodendronand Atriplex canescens on physical-chemical ch...

Abouzar Emadi Arash Azarpanah Korosh Ordookhani Mahdi Zare,

Objective: Soil salinity is one of the major worldwide environmental constraints affecting agricultural production in arid and semiarid regions. Lack of proper management of water and soil resources lead to increase soil salinity and reduce soil fertility. On the other hand, it seems simple and cheap method of measuring soil salinity is necessary. The aim of this study was to determine the rela...

2010
Direk Limmathurotsakul Vanaporn Wuthiekanun Narisara Chantratita Gumphol Wongsuvan Premjit Amornchai Nicholas P. J. Day Sharon J. Peacock

BACKGROUND Melioidosis is a frequently fatal infectious disease caused by the soil dwelling Gram-negative bacterium Burkholderia pseudomallei. Environmental sampling is important to identify geographical distribution of the organism and related risk of infection to humans and livestock. The aim of this study was to evaluate spatial distribution of B. pseudomallei in soil and consider the implic...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان همدان - دانشکده ادبیات و علوم انسانی 1390

the present research has been deducted from a provincial research project which aims at determining the relationship of variables of variables of occupational self-concept, intelligence beliefs and metacognitive with entrepreneurship among the students of payame noor university of kurdistan. the volume of the samples was 1080 students (576 female and 504 male students). the research methodology...

ژورنال: علوم آب و خاک 2002
احمد سواری, , غلامحسین وثوقی, , سیدمحمدباقر نبوی, , علیرضا نیکویان, ,

To estimate the biomass and secondary production of macrobenthos in Khore-e-Mousa creeks, 216 sediment samples were taken. The sampling period started in 1996 and terminated in 1997. A bimonthly sampling strategy was adopted. The samples were taken by Van-Veen grab (0.1 m2) from the beginning, middle and end of each creek (Khor). To estimate the biomass of the macrobenthos, the Crisp method (...

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