نتایج جستجو برای: spatial variability

تعداد نتایج: 481155  

Journal: :آب و خاک 0
افشار افشار صالحی صالحی محمّدی محمّدی محنت کش محنت کش

abstract the quality of soil maps depends upon their ability to show the soils variability. thus, the accuracy of the maps used for crop recommendations is due to the accuracy of soil maps. this study was performed to investigate the amount of soil properties and crop yield spatial variability in s 2 and s3 units of a semi-detailed quantitative suitability map (1:50000 scale) for irrigated whea...

Journal: :international journal of epidemiology research 0
mojgan entezari university of isfahan shohreh moradpour university of isfahan masoud amiri shahrekord university of medical sciences

background and aims: brucellosis is one of the most important common diseases among man and livestock which are considered as the major problem in the health of the humans and livestock. the importance of this disease isn’t limited to its physical problems and consequences, but it is considered as a major challenge of economic development in most countries. the aim of this study was to evaluate...

Journal: :desert 2012
mohammad jafari m tahmoures h mohammad asgari m biniaz

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...

Journal: :مدیریت خاک و تولید پایدار 0
زهرا ذوالفقاری دانشکاه صنعتی اصفهان- گروه خاکشناسی شمس الله ایوبی دانشکده کشاورزی، دانشگاه صنعتی اصفهان محمد رضا مصدقی اصفهان- دانشگاه صنعتی اصفهان- گروه خاکشناسی

this study was conducted to investigate the spatial variability of model parameters of soil shrinkage curve in cherlgerd district, chaharmahal-va-bakhtiari province. ninety nine locations were selected and soil clods were collected from the 0-10 cm layer and brought to the laboratory. soil shrinkage curve was measured, according to archimedes's principle, by covering the undisturbed clods ...

Journal: :iran agricultural research 2015
e. bijanzadeh m. mokarram r. naderi

abstract- the information on the spatial properties of soil is vital to improve soil management and to increase the crop productivity. geostatistical analysis technique is one of the most important methods for determining the spatial properties of soil. the aim of this study was to investigate spatial variability of soil chemical and physical attributes for field management in eastern shiraz, i...

Abstract Introduction Characterization of physical and chemical soil criteria is a key step in understanding the source of spatial variability in the productivity across agricultural fields (21). Crop yield variability can be caused by many factors, including spatial variability of soil texture, crop management, soil physical and chemical properties and nutrient availability (45). Understandin...

2015
Daniel J. Short Gianotti Bruce T. Anderson Guido D. Salvucci

Weather and climate prediction rely on inherently different predictors at different time scales. Some of the variability in precipitation on climate time-scales (i.e., interannual) could be attributed to accumulated noise on weather (i.e., daily) time-scales. To determine a lower bound on how much climate variability is due to processes at climate time-scales, weather generator models with no m...

2006
Roger A. Pielke Marek Uliasz

Using idealized distributions of surface moisture, it is shown that with a significant synoptic prevailing flow over these regions of surface variability, dispersion is generally enhanced over heterogeneous surfaces as compared to horizontally homogeneous conditions. The importance of the heterogeneity becomes less, however, as the large scale wind speed increases and/or the spatial scale of th...

2015
Elena Nikolaeva Eugeny Vergunov Alexander Dobrin

Heart rate variability of left-handed and right-handed children in three different situations was compared. The first record was made in quite situation; the second one was made when child answered the questions about rewards in family and the third one when she (he) answered the questions about punishment. We have shown that heart rate variability of lefthanded children in three situations did...

Journal: :International Journal on Artificial Intelligence Tools 2014
Xi Long Pedro Fonseca Reinder Haakma Ronald M. Aarts Jérôme Foussier

• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید