نتایج جستجو برای: soil mineralogy

تعداد نتایج: 184575  

اشرف امیری نژاد, علی , باقر نژاد, مجید ,

The calcification of soils and the effects of topography on this process were studied in semi-arid regions of Kermanshah. From a toposequence, based on the previous soil surveys of the region, five profiles were selected, and field studies and laboratory analyses were carried out on soils. Alluvial - colluvial fans, piedmont alluvial plains, and old plateaux were three main physiographies on th...

Journal: :مدیریت خاک و تولید پایدار 0
نگار یزدانی جهرمی دانش آموخته کارشناسی ارشد بخش علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان، ایران محمد هادی فرپور استاد بخش علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه شهید باهنر کرمان، کرمان، ایران مصطفی کریمیان اقبال دانشیار بخش علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران، ایران

background and objectives : zeolite is a group of anionic hydrated aluminosilicates with a tridimensional structure which has great implications in remediation of water, sediment and soil resources. the present research aims at physicochemical investigation, clay mineralogy and micromorphology of soils along rafsanjan-sarcheshmeh lithotoposequence, southeastern iran. materials and methods: the ...

2014
S. Aravindan

In order to determine mineralogy of rock and soil samples, reflectance and emittance spectroscopy in the near-infra red and short-wave infra-red is used extensively and found to be inexpensive. Hyper spectral remote sensing satellite data are found to be prospective to deliver in depth physico-chemistry like mineralogy, chemistry, morphology of the earth’s surface. Therefore hyper spectral data...

Soil is one of the most important natural resources covering a large area of the land surface. Soil plays a vital role in biosphere processes, such as energy balance, hydrology, biochemistry, and biological productivity. It supports plants that supply foods, fibers, drugs, and some other human needs. Conversely, desert regions include about one third of earth lands and these regions have increa...

ژورنال: علوم آب و خاک 1999
اشرف امیری نژاد, علی , باقر نژاد, مجید ,

The calcification of soils and the effects of topography on this process were studied in semi-arid regions of Kermanshah. From a toposequence, based on the previous soil surveys of the region, five profiles were selected, and field studies and laboratory analyses were carried out on soils. Alluvial - colluvial fans, piedmont alluvial plains, and old plateaux were three main physiographies on th...

2014
David Bish David Blake David Vaniman Philippe Sarrazin Thomas Bristow Cherie Achilles Przemyslaw Dera Steve Chipera Joy Crisp R. T. Downs Jack Farmer Marc Gailhanou Doug Ming John Michael Morookian Richard Morris Shaunna Morrison Elizabeth Rampe Allan Treiman Albert Yen

The Mars Science Laboratory landed in Gale crater on Mars in August 2012, and the Curiosity rover then began field studies on its drive toward Mount Sharp, a central peak made of ancient sediments. CheMin is one of ten instruments on or inside the rover, all designed to provide detailed information on the rocks, soils and atmosphere in this region. CheMin is a miniaturized X-ray diffraction/X-r...

2003
Shahid Azam

The mineral calcium sulphate transforms from anhydrite through bassanite to gypsum and then can convert back to bassanite and anhydrite. This transformation of calcium sulphate causes volume change that adds to the potential hazards with indigenous soils containing expansive clay minerals. Heave and settlement are the most important geotechnical problems associated with many argillaceous soils ...

Journal: :E3S web of conferences 2023

Soil engineering properties are usually determined in a laboratory setting at room temperature of 270C. Seasonal changes, which is mainly the alteration thermal condition surrounding soil, causes reasonable concern about nature and magnitude changes influences soil properties. The particle size distribution, consistency limit, strength, mineralogy, permeability all accompanied by rise temperatu...

Journal: :FEMS microbiology ecology 2004
Johanna V Weiss David Emerson J Patrick Megonigal

We compared the reactivity and microbial reduction potential of Fe(III) minerals in the rhizosphere and non-rhizosphere soil to test the hypothesis that rapid Fe(III) reduction rates in wetland soils are explained by rhizosphere processes. The rhizosphere was defined as the area immediately adjacent to a root encrusted with Fe(III)-oxides or Fe plaque, and non-rhizosphere soil was >0.5 cm from ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده کشاورزی 1387

پیدایش، تکامل، رده بندی، ویژگیهای مورفولوژیکی، فیزیکوشیمیایی و کانی شناسی خاکهای حوضه سوارغیب از توابع فراشبند در استان فارس با وسعت حدود 13/55 کیلومتر مربع تحت تأثیر توپوگرافی های مختلف، به عنوان یک عامل خاکساز مورد بررسی قرار گرفت. براساس روش گئوسن، رژیم حرارتی منطقه هایپرترمیک و رژیم رطوبتی منطقه اریدیک می باشد. سه واحد فیزیوگرافی شامل مخروط افکنه های واریزه ای سنگریزه دار، دشت های دامنه ای ...

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