نتایج جستجو برای: soil chemical

تعداد نتایج: 545143  

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2005
Masaki Takaoka Satoshi Fukutani Takashi Yamamoto Masato Horiuchi Naoya Satta Nobuo Takeda Kazuyuki Oshita Minoru Yoneda Shinsuke Morisawa Tsunehiro Tanaka

Only limited information is available about the behavior of antimony (Sb) in contaminated soils. However, understanding the behavior of Sb in contaminated soils is important, because the toxicity or solubility of this element depends on its chemical state. In this study, we investigated the levels of Sb and the chemical forms of Sb in the soil around a smelter using X-ray absorption fine struct...

2015
Xiaojia Zeng Xiongyao Li Shijie Wang Shijie Li Nicole Spring Hong Tang Yang Li Junming Feng

It is important to develop Martian soil simulants that can be used in Mars exploration programs and Mars research. A new Martian soil simulant, called Jining Martian Soil Simulant (JMSS-1), was developed at the Lunar and Planetary Science Research Center at the Institute of Geochemistry, Chinese Academy of Sciences. The raw materials of JMSS-1 are Jining basalt and Fe oxides (magnetite and hema...

2014

Results of a field study carried out at Trinitapoli (Puglia region, southern Italy) on the irrigation of an artichoke crop with three types of water (secondary-treated wastewater, SW; tertiary-treated wastewater, TW; and freshwater, FW) are reported. Physical, chemical and microbiological analyses were performed on the irrigation water, and on soil and yield samples. The levels of most of the c...

Journal: :مرتع و آبخیزداری 0
حمزه سعیدیان کارشناس ارشد آبخیزداری، دانشکده منابع طبیعی، دانشگاه تربیت مدرس، حمیدرضا مرادی استادیار دانشکده منابع طبیعی، دانشگاه تربیت مدرس فرج ا... ترنیان senior expert of range management

using of different systems of soil plough after changing unconsciously and non-scientific of land use, other soil physical and chemical characteristics affected. this fact, especially in marginal lands and mountainous regions is more visible. this research compared with the purpose of studying land use changing on some soil physical and chemical characters like very tiny sand percent, ph, ec, c...

2014

Earthworms mix soil layers and incorporate organic matter into the soil. This mixing allows the dispersion of the organic matter through the soil and makes the nutrients held in it available to plants and improves the fertility of the soil. Earthworms when present improve the soil physical, chemical and biological properties and acts as soil conditioner. They do so by fragmentation, aeration, b...

ژورنال: علوم آب و خاک 2010
حق نیا, غلامحسین , فتوت, امیر , لکزیان , امیر , رنجبر , احسان ,

This study was conducted to compare the impact of various organic amendments with different C/N ratios and chemical compositions on biological and chemical degradation of Atrazine in sterile and non-sterile soils. The experiment was carried out in a factorial arrangement (2×6×2) including two soil types (sterile and non sterile soils), six types of organic amendments (vermicompost, cow manure, ...

2017
Tianzhu Li Tongtong Liu Chengyu Zheng Chunsheng Kang Zichao Yang Xiaotong Yao Fengbin Song Runzhi Zhang Xuerong Wang Ning Xu Chunyi Zhang Wei Li Shumin Li

Greenhouse eggplant monocropping in China has contributed to the aggravation of soil-borne diseases, reductions in crop quality and yield, and the degradation of physical and chemical soil properties. Crop rotation is one effective way of alleviating the problems of continuous cropping worldwide; however, few studies have reported changes in soil bacterial community structures and physical and ...

2016
Lars Kjellenberg Eva Johansson Karl-Erik Gustavsson Artur Granstedt Marie E. Olsson

This study assessed the concentrations of three falcarinol-type polyacetylenes (falcarinol, falcarindiol, falcarindiol-3-acetate) in carrots and the correlations between these and different soil traits. A total of 144 carrot samples, from three different harvests taken a single season, were analysed in terms of their polyacetylene concentrations and root development. On one of the harvesting oc...

ژورنال: علوم آب و خاک 2014
خراسانی, رضا, فتوت, امیر, مظلوم, نجمه, هاشمی نژاد, یوسف,

The reclamation of salt-affected soils which occur on 831×106 ha can be effective in increasing agricultural production. Cultivation of plant species which are resistant to salinity can improve the soil by increasing the solubility of calcite and releasing the calcium in soil solution. This study was conducted as a column experiment with a saline-sodic soil (SAR = 23.8, EC= 12.88 dS m-1, pH= 7....

Journal: :Applied and environmental microbiology 1994
D B Knaebel T W Federle D C McAvoy J R Vestal

This research addressed the effect of mineral and organic soil constituents on the fate of organic compounds in soils. Specifically, it sought to determine how the associations between organic chemicals and different soil constituents affect their subsequent biodegradation in soil. Four C-labeled surfactants were aseptically adsorbed to montmorillonite, kaolinite, illite, sand, and humic acids....

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