نتایج جستجو برای: spatial variability

تعداد نتایج: 481155  

حسینی, سید محسن, سلمان ماهینی, عبدالرسول , صیاد, احسان , غلامی, شایسته , محمدی , جهانگرد,

The spatial distribution of soil organisms is influenced by the plant cover, thus resulting in a horizontal mosaic of areas subjected to gradients of nutrient availability and microclimatic conditions.This study was conducted to investigate the spatial variability of soil macrofauna in relation to vegetation density in the riparian forest landscape of Karkhe. The vegetation density was determin...

Journal: :اکو هیدرولوژی 0
عبدالرسول زارعی استادیار، گروه مرتع و آبخیزداری، دانشکدۀ کشاورزی، دانشگاه فسا محمد جواد امیری استادیار، گروه مهندسی آب، دانشکدۀ کشاورزی، دانشگاه فسا

quality properties of groundwater is one of the major components which can used for water resources management. in this study, spatial variability of groundwater quality for drinking uses (schoeller standards) and agricultural uses (wilcox standards) was investigated during 1387-1392.in this research, we use information of 24 observation wells in fasa plain, to investigate the spatial variabili...

محمدی, جهانگرد ,

This study addresses the methodology of studying spatial variability of soil salinity. The information used is based on a semi-detailed soil survey, followed by a free survey, conducted in Ramhormoz, Khuzestan. The study of soil salinity variations was carried out using about 600 sampling points with an average distance of 500 m, at three depths of 0-50, 50-100, and 100-150 cm. To determine the...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان - دانشکده جنگلداری و مهندسی چوب و کاغذ 1391

درک الگوی توزیع مکانی ماکروفون خاک بدلیل اثرات آن روی فرآیندهای اکوسیستم بسیار مهم است. لیکن اطلاعات کمی در این خصوص وجود دارد. درمورد تنوع زیستی ارگانیسم ها وجانداران خاکزی که ازاجزای مهم وکلیدی درهرسیستم اکولوژیکی هستند و در بهبود حاصلخیزی خاک و تولیدات زمین وپایداری اکوسیستم ها(ازطریق فرآیندهای بیولوژیک)نقش عمده دارند تحقیقات کمی انجام شده است. این تحقیق جهت بررسی الگوی مکانی پارامترهای تنوع...

شمس ا...ایوبی, , سارا محمدزمانی, , فرهاد خرمالی, ,

Evaluating agricultural land management practices requires a thorough knowledge of soil spatial variability and understanding their relationships. This study was conducted at a traditionally operated wheat field in Sorkhankalateh district, located about 25 km northeast of Gorgan, in Golestan province, Iran. Soil samples of the 0-30 cm depth were collected right after planting at the end of autu...

ژورنال: علوم آب و خاک 1999
محمدی, جهانگرد ,

This study addresses the methodology of studying spatial variability of soil salinity. The information used is based on a semi-detailed soil survey, followed by a free survey, conducted in Ramhormoz, Khuzestan. The study of soil salinity variations was carried out using about 600 sampling points with an average distance of 500 m, at three depths of 0-50, 50-100, and 100-150 cm. To determine the...

ژورنال: علوم آب و خاک 2009
ایوبی, شمس اله, خرمالی, فرهاد,

Understanding distribution of soil properties at the field scale is important for improving agricultural management practices and for assessing the effects of agriculture on environmental quality. Spatial variability within soil occurs naturally due to pedogenic factors as well as land use and management strategies. The variability of soil properties within fields is often described by classica...

ژورنال: علوم آب و خاک 2007
شمس ا...ایوبی, , سارا محمدزمانی, , فرهاد خرمالی, ,

Evaluating agricultural land management practices requires a thorough knowledge of soil spatial variability and understanding their relationships. This study was conducted at a traditionally operated wheat field in Sorkhankalateh district, located about 25 km northeast of Gorgan, in Golestan province, Iran. Soil samples of the 0-30 cm depth were collected right after planting at the end of autu...

Journal: Desert 2011
H Mohammad Asgari M Biniaz M Tahmoures Mohammad Jafari

The main objective in the present study was to assess the spatial variation of chemical and physical soil properties and then use this information to select an appropriate area to install a pasture rehabilitation experiment in the Zereshkin region, Iran. A regular 250 m grid was used for collecting a total of 150 soil samples (from 985 georeferenced soil pits) at 0 to 30, and 30 to 60 cm layers...

ایوبی, شمس اله, خرمالی, فرهاد,

Understanding distribution of soil properties at the field scale is important for improving agricultural management practices and for assessing the effects of agriculture on environmental quality. Spatial variability within soil occurs naturally due to pedogenic factors as well as land use and management strategies. The variability of soil properties within fields is often described by classica...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید