نتایج جستجو برای: 60 surface soil samples 0

تعداد نتایج: 1910744  

آجرلو, مجید, بشری, حسین, جوزقیان, امیر, پهلوانروی, احمد,

This study evaluates the impacts of clay and gypsum mining on ecosystem structure and function using Landscape Function Analysis (LFA) in Segzi plain, Isfahan. The length and width of patches and inter-patches length were recorded along the 18 established 50-meters transects in mining and reference sites. Eleven soil surface indicators were evaluated using LFA method in these patches and inter-...

2017
Douglas Karlen Diane E. Stott Cynthia A. Cambardella Robert J. Kremer Greg W. McCarty Douglas L. Karlen

Soil quality (SQ) assessment is a proactive process for evaluating soil and crop management effects on biological, chemical, and physical indicators of soil health. Our objectives were to evaluate several SQ indicators within five Agricultural Research Service (ARS) experimental watersheds (WS) and determine if those indicators were affected by manure, tillage, or crop rotation histories. Ten s...

2015
Amir M. González-Delgado Jamshid Ashigh Manoj K. Shukla Russ Perkins

Indaziflam, a broad-spectrum, pre-emergence herbicide was the focus of a field investigation conducted after the identification of sporadic injury symptoms on the pecan trees a few months after the application. The study was conducted in two pecan orchards located in southern New Mexico, USA, and southeastern Arizona, USA. The objectives of this study were to evaluate the occurrence and distrib...

2016
O. J. Ayodele O. S. Shittu

The effects of ash refuse pile from a black soap-making facility were studied on the surface (0-15 cm) layer of soils and commonest plants at Ori-Ebu, Afao Quarter, Ikere-Ekiti in Nigeria. Soil and plant samples were collected at 0, 15, 30, 60, 75, 105 and 150 m from the ash refuse pile and analyzed for cadmium (Cd), cobalt (Co), chromium (Cr), lead (Pb) and nickel (Ni). The prominent plant spe...

2014
Lili Chen Zhiyou Yuan Hongbo Shao Dexiang Wang Xingmin Mu

Thinning is a crucial practice in the forest ecosystem management. The soil infiltration rate and water storage capacity of pine-oak mixed forest under three different thinning intensity treatments (15%, 30%, and 60%) were studied in Qinling Mountains of China. The thinning operations had a significant influence on soil infiltration rate and water storage capacity. The soil infiltration rate an...

Journal: :نشریه بازیافت آب 0
مینا ارست کاشان، دانشگاه کاشان، دانشکدة منابع طبیعی و علوم زمین، گروه جغرافیا و اکوتوریسم غلامرضا زهتابیان تهران، دانشگاه تهران، دانشکدة منابع طبیعی، گروه احیای مناطق خشک و کوهستانی محمد جعفری تهران، دانشگاه تهران، دانشکدة منابع طبیعی، گروه احیای مناطق خشک و کوهستانی حسن خسروی تهران، دانشگاه تهران، دانشکدة منابع طبیعی، گروه احیای مناطق خشک و کوهستانی

management of unconventional water management in agricultural lands reduces environmental risks and increases its productivity. the purpose of this study was evaluating and comparing the effect of wastewater, saltwater and brackish water on some soil physical and chemical properties. for this purpose, five study sites including control area, irrigation with saltwater, brackish water wastewater ...

ژورنال: علوم آب و خاک 2014
جعفری, سیروس, پیشگیر, معصومه,

This study was done to compare K+ and NH4+ fixation in different agricultural systems in Khuzestan province. Soil samples were collected from Shushtar and Abadan. Samples were collected from depths of 0-30 and 30-60 cm in sugarcane, multi cropping, palm and uncultivated land. Then, 0-50-100-200-400-600-800-1000 mg kg-1 K+ or NH4+ concentrations were added to 0.5 gram of clay separated from thes...

Journal: :آب و خاک 0
خلیل مقدم خلیل مقدم افیونی افیونی جلالیان جلالیان عباسپور عباسپور دهقانی دهقانی

abstract surface soil shear strength is an effective parameter in soil erosion and runoff modeling, and known as soil erodibility index. this study was conducted to investigate and predict soil shear strength in central zagros region using multiple linear regressions (mlr). the study site was selected in rangeland and degraded-rangeland landuse with an area of 23562 ha. based on the maps of geo...

Journal: :Processes 2022

Heavy metals mainly enter tea from the soil. In this study, stratified soil samples were collected, at a depth of 0–60 cm, using drill in An-tea plantations. Speciation As, Cd, Cr, Cu, Ni, Pb, and Zn was determined European Community Bureau Reference sequential extraction method, heavy metal concentrations extracts by inductively coupled plasma?mass spectrometry. Compared with other layers, mea...

ژورنال: سلامت و محیط زیست 2015
اسماعیلی ساری, عباس, ریاحی بختیاری, علیرضا , سلگی, عیسی, هادی پور, مهرداد ,

Background and Objectives: Arsenic contamination is of great environmental concern due to its toxic effects as a carcinogen. In order to assess soil arsenic contamination and its distribution patterns, surface soil samples collected from the urban areas of Arak were analyzed. Materials and Methods: Totally, 62 surface soil samples were collected from depth of 0–20 cm of different locations incl...

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