نتایج جستجو برای: salt leaching

تعداد نتایج: 89382  

H Sakhaei-Rad M Valipour,

Soil correction is one of the ways in agriculture lands development. The sodic ion alongside salin vocalizes the salin-sodic soil and cause divulge in plants growth. So necessary coure of action for the Soil correction by physical and chemical ways such as usage of calsium on the leaching is inevitable. In this study, area soils are digged from deep profiles of 0-20, 20-40, 40-60, 60-80 and 80-...

Journal: :مدیریت آب و آبیاری 0
محمود مشعل استادیار گروه مهندسی آبیاری و زهکشی، پردیس ابوریحان، دانشگاه تهران، پاکدشت - ایران محمد دانشور کارشناس ارشد گروه مهندسی آبیاری و زهکشی، پردیس ابوریحان، دانشگاه تهران، پاکدشت - ایران سعید امامی فی کارشناس ارشد گروه مهندسی آبیاری و زهکشی، پردیس ابوریحان، دانشگاه تهران، پاکدشت - ایران مریم وراوی پور استادیار گروه مهندسی آبیاری و زهکشی، پردیس ابوریحان، دانشگاه تهران، پاکدشت - ایران

soil salinization is a process in which the accumulation of soluble salts in soil profile can affect soil physical and chemical properties, such as osmotic pressure, permeability and hydraulic conductivity. these, in turn, can seriously impair or completely stop the growth of plants. in this study, four theoretical models for predicting soil leaching contains including series of reservoirs  mod...

2014
Tibor Tóth Kitti Balog András Szabó László Pásztor Esteban G. Jobbágy Marcelo D. Nosetto Zoltán Gribovszki

In flat sedimentary plains in areas with a sub-humid climate, tree planting on grasslands and arable lands creates strong hydrological shifts. As a result of deep rooting and high water uptake of trees, groundwater levels drop and subsurface salt accumulation increases. Tree planting has expanded globally and in Hungary it reached rates of 15 000 ha year(-1), being focused mainly in the Great H...

2004
Y. A. Wood R. C. Graham S. G. Wells

Desert pavement is a distinctive feature widespread across arid lands of the world. It plays a dynamic role in geomorphic, hydrologic, and ecologic processes. Where desert pavement predominates, infiltration is limited and rainfall is delivered as runoff to nearby bare ground areas where shrubs cluster. Desert pavement surfaces may appear monotonously flat and barren, but we have found, instead...

2017
Abdur R. Siddiq Andrew R. Kennedy

Porous PEEK structures with approximately 85% open porosity have been made using PEEKOPTIMA® powder and a particulate leaching technique using porous, near-spherical, sodium chloride beads. A novel manufacturing approach is presented and compared with a traditional dry mixing method. Irrespective of the method used, the use of near-spherical beads with a fairly narrow size range results in unif...

Journal: :Chemosphere 2015
Meric Selbes Ozge Yilmaz Abdul A Khan Tanju Karanfil

One concern for recycle and reuse of scrap tires is the leaching of tire constituents (organic and inorganic) with time, and their subsequent potential harmful impacts in environment. The main objective of this study was to examine the leaching of dissolved organic carbon (DOC), dissolved nitrogen (DN), and selected inorganic constituents from scrap tires. Different sizes of tire chips and crum...

2011
H. Farris V. Chevrier

Introduction: In 2008, NASA’s Phoenix lander arrived in the northern arctic plain of Mars. Its objective was to perform analyses on the subsurface water ice, ultimately characterizing the geology, climate, and habitability of the Martian polar regions. Two of the instruments on board were TECP (Thermal Electric Conductivity Probe), which recorded temperature and relative humidity measurements, ...

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