Volume 38 (2024)
Volume 37 (2023)
Volume 36 (2022)
Volume 35 (2021)
Volume 34 (2020)
Volume 33 (2019)
Volume 32 (2018)
Volume 31 (2017)
Volume 30 (2016)
Volume 29 (2015)
Volume 28 (2014)
Volume 27 (2013)
Volume 25 (2011)
Volume 24 (2010)
Volume 23 (2009)
Volume 22 (2008)
Research Article
A Downscaling Model Based on K-nearestneighbor(K-NN) Non-parametric Method

H. Seyyed Kaboli; A.M. AkhodAli; A.R. Masah Bavani; F. Radmanesh

Volume 26, Issue 4 , September and October 2012, Pages 799-808


  General Circulation Models (GCMs) have been identifiedas asuitable tool for studying climate change. Butthese models simulate climatic parametersinthe large-scale which has poor performance in the simulation of processes such asrain fall-run off. There fore, several of down scaling methods were developed. ...  Read More

Research Article
The Effects of Water Soluble Polymers on Physical Properties of the Soils with Different Texture in Hamedan

H.R. Samaei; A. Golchin; Mohammad Reza Mosaddeghi; Sh. Ahmadi

Volume 26, Issue 4 , September and October 2012, Pages 809-817


  Organic matter improves soil structure and any factor that decreases soil organic matter content causes soils structural instability. In soils with low organic matter content, soluble polymers can be used to increase the soil structural stability. In order to study the effects of polymer type and concentration ...  Read More

Research Article
Effect of Lime, Phosphorus and Organic Matter on Maize Ability for Iron Uptake

L. Ghorashi; Gh. Haghnia; A. Lakzian; R. Khorasani

Volume 26, Issue 4 , September and October 2012, Pages 818-825


  Iron is an essential micronutrient for plant growth. The existence of lime, low content of organic matter and excess application of phosphate fertilizer in soils are the factors affecting its availability. In this study the effects of lime, phosphorus and organic matter on growth and iron uptake of maize ...  Read More

Research Article
Effects of Converting Forest to Tea Garden on Soil Fertility in Guilan Province

B. Shiranpour; A. Bahrami; M. Shabanpour

Volume 26, Issue 4 , September and October 2012, Pages 826-831


  Due to high organic matter and strong structure, the forest soils in Guilan province are potentially productive. This study was conducted to show the effects of land use change on soil fertility in four different sites in Guilan province where the location of tea garden and forest have the same physiography ...  Read More

Research Article
Evaluation the Effect of Myccorhiza and Degrading Bacteria in Enhancing Phytoremediation of Oil Compound in Oil Contaminated Soil

V. Sarvi Moghanlo; Mostafa Chorom; M. Falah; H. Motamedy

Volume 26, Issue 4 , September and October 2012, Pages 832-841


  Due to widespread distribution, hydrocarbon toxicity and mutagencity, PAHs are listed as hazardous pollutants, and remediation of soils contaminated with PAHs is a major challenge. The use of degrading microorganisms and plants for bioremediation of PAHs-contaminated environments seems to be a viable ...  Read More

Research Article
Evaluation of Nitrate Deep Leaching under Maize Furrow Fertigation

Y. Abbasi; A. Liaghat; F. Abbasi

Volume 26, Issue 4 , September and October 2012, Pages 842-853


  Suitable management of water and fertilizer is one of the important factors, affecting water and fertilizer efficiency and environmental pollution. In this study, nitrate deep leaching was evaluated in a furrow irrigated experimental field in Karaj. Experiments were conducted in randomized complete blocks ...  Read More

Research Article
Estimation of Daily Reference Evapotranspiration with Fuzzy Inference Systems

H. Moradi; H. Ansari; majid hashemi nia; A. Alizadeh; A. Vahidian Kamyad; S.M.J. Mosavi

Volume 26, Issue 4 , September and October 2012, Pages 854-863


  Evapotranspiration is one of the major components of hydrologic cycle and estimation of irrigation needs. In recent years the use of intelligent systems for estimating hydrological phenomena has increased significantly.In this study the possibility of using fuzzy inference system efficiency, creating ...  Read More

Research Article
The Effect of Cadmium, Zinc and Phosphorus on Glomalin Produced by Arbuscular Mycorrhizal (AM) Fungi in Symbiosis with White Clover

A. Maadani; A. Lakzian; Gh. Haghnia; R. Khorasani

Volume 26, Issue 4 , September and October 2012, Pages 864-872


  High concentration, of heavy metals and the presence of phosphorus in soils may cause a reduction in the growth and activity of arbuscular mycorrhizal (AM) fungi and consequently, the spore production of these fungi would decrease. In order to evaluate the effect of zinc and cadmium as heavy metals and ...  Read More

Research Article
Comparison Between Land Production Potential Prediction for Maize, Using FAO and Wageningen Models and Assessment of Management Level for Its Cultivation Around Shahrekord City

J. Givi; M.R. Nouri

Volume 26, Issue 4 , September and October 2012, Pages 873-885


  Proper use of agricultural lands is essential because of fast growing population and water stress which occurs in arid and semi-arid regions. In this regards, land suitability evaluation and land production potential prediction are two important prerequisites for land use planning. This research was ...  Read More

Research Article
Determining Factors Influencing The Attitude of Farmers Toward Sprinkler Systems in Kermanshah Province

A. Aazami; K. Zarafshani; hossein dehghani; A. Gorji

Volume 26, Issue 4 , September and October 2012, Pages 886-896


  The purpose of this integrative (quantitative-qualitative) descriptive survey study was to determine factors influencing farmers’ attitude toward sprinkler irrigation systems. A researcher made questionnaire was used to collect data. A sample of 274 farmers who were equipped with sprinkler irrigation ...  Read More

Research Article
Spatial Prioritization of Land Degradation Using IMDPA Model with Emphasis on Wind Erosion and Climate (Case Study: Bordekhun Region of Boushehr)

F. Bahreini; A. Pahlavanravi; A. Moghaddamnia; Gh. Rahi

Volume 26, Issue 4 , September and October 2012, Pages 897-907


  Desertification and land degradation in arid, semi-arid and sub-humid dry regions, are a global environmental problem. Therefore, accurate assessment of desertification trend will be useful to prevent and eradicate these problems. The study area is located in Daiyer city of Boushehr province. In this ...  Read More

Research Article
The Bioremediation of an Aged Petroleum-Contaminated Soil Using Bioaugmentation and Phytoremediation Thecniques

S. Rajaei; F. Raiesi; S.M. Seyedi

Volume 26, Issue 4 , September and October 2012, Pages 908-921


  The contamination of ecosystem components with petroleum and its derivatives is considered as one of the most crucial environmental threat in Iran, particularly in southern areas. Bioremediation has frequently been regarded as an appropriate and more practical alternative to clean-up petroleum hydrocarbons ...  Read More

Research Article
Influence of Topography and Soil Characteristics on the Rainfed Wheat Yield in Sisab Region, Northeastern Iran

A. Shabani; Gh. haghnia; Ali reza Karimi; M.M. Ahmadi

Volume 26, Issue 4 , September and October 2012, Pages 922-932


  Topographic characteristics are considered as important factors for growth and yield of rainfed crops because of the impact on the water distribution and consequently effects on soil physical and chemical properties. No information is available on this subject for North Khorasan province of Iran. The ...  Read More

Research Article
Regression Analysis, Genetic Programming and ANN to Predict Discharge Coefficient of Compound Broad Crested Weir

A. Masoodi; P. Parsamehr; F. Salmasi; S. Pureskandar

Volume 26, Issue 4 , September and October 2012, Pages 933-942


  Compound broad-crested weir, have a small inner rectangular section for measuring low flows and then, they broaden to a wide rectangular section at higher flow depths. This paper presents data that will be of use in the design of hydraulic structures for flow control and measurement. A series of laboratory ...  Read More

Research Article
Identifying the Regional Homogeneity of Ungauged Station for Regional Flood Frequency Analysis Using Canonical Correlation Method
Volume 26, Issue 4 , September and October 2012, Pages 943-952


  Regional flood analysis is a conventional method for estimation of flood design in ungauged site which its accuracy relates the how much homogeneity is among the stations that used in regional flood frequency. Cluster method is commonly used to regionalization of stations which its accuracy is dependent ...  Read More

Research Article
Evaluation of Phosphorus Acquisition and Utilization Efficiency of Wheat Genotypes in Rock Phosphate

E. Iranshahr; E. Sepehr

Volume 26, Issue 4 , September and October 2012, Pages 968-978


  A factorial completely randomized design experiment with three replications was carried out in greenhouse to evaluate the phosphorus (P) acquisition and utilization efficiency of 20 wheat genotypes in a river sand fertilized with rock phosphate (RP) and soluble P (PS). Results showed significant differences ...  Read More

Research Article
Regionalization of Northwest Iran Based on Daily Rainfalls and Rain’s Time Intervals Using PCA, Ward and K-mean Methods

B. Fallahi; A. Fakheri Fard; yaghoub dinpazhoh; S. Darbandi

Volume 26, Issue 4 , September and October 2012, Pages 979-989


  Having a correct view of the effective factors on climatic changes by explanation of a considerable part of the total variance in data with limited number of principal components the analytical methods of decreasing data dimensions, such as PCA are important tools in water resources planning. In this ...  Read More

Research Article
Study on The Yield Assesse Indexes and Determinate Optimum Depth Irrigation for Two Cultivars of Cotton on Different Level of Water Salinity

M.H. Najafi Mood; A. Alizadeh; K. Davari; M. Kafi; A. Shahidi

Volume 26, Issue 4 , September and October 2012, Pages 990-998


  This experiment was conducted based upon a factorial split plot design consisting of three factors: salinity with three levels (2.2, 5.5 and 8.3 dS/m), irrigation with four levels (50%, 75%, 100% and 125%), cultivars with two levels (Varamin and Khordad). There were three replicates for each treatment ...  Read More

Research Article
Application of Fuzzy Analytical Hierarchy Process in Determining the Optimum Alternative of Brackish water Desalination

S.A. Ghassemi; Sh. Danesh

Volume 26, Issue 4 , September and October 2012, Pages 999-1009


  In this research a fuzzy decision making model was presented to assess and rank various water desalination methods and ultimately select the best alternative. The desalination alternatives which were investigated included Reverse Osmosis, Electrodialysis, Multi-Stage Flash Distillation, Multi-Effect ...  Read More

Research Article
The Comparison of Water Balance Parameters in Traditional and Leveled Paddy Fields in Qaemshahr, Iran

A. Shahnazari; Mirkhaleg Ziatabar Ahmadi; ghassem aghajani mazandarani

Volume 26, Issue 4 , September and October 2012, Pages 1010-1017


  Rice is the most important agricultural product in the world after wheat, and Iran has a special place in producing almost two million tones of rice per year. Considering the drought crisis and high consumption of water in paddy fields, it is useful to present strategies in order to increase irrigation ...  Read More

Research Article
Application of Stable Isotope and Hydrogeochemistry to Investigat the Origin and Water Resources' Quality Variations in Zarivar Lake Cathment Area

H. Mohammadzadeh; S. Ebrahimpoor

Volume 26, Issue 4 , September and October 2012, Pages 1018-1031


  Zarivar Lake, located in west of Marivan -Kurdistan province, is an important natural freshwater body in Iran. Therefore, it is essential to investigate and to protect the water resources of the lake's catchment area. In this research, to develop the Marivan meteoric water line (MMWL - δ18O vs. δ2H), ...  Read More

Research Article
Using of Pedotransfer Functions for Studying the Effect of Soil Cultivation on Determining of Soil Moisture at Field Capacity and Permanent Wilting Point

H. Aryanpour; Mehdi Shorafa; A. Liaghat

Volume 26, Issue 4 , September and October 2012, Pages 1042-1050


  As far as soil moisture is a function of soil structure and texture any changes on these properties changes the soil moisture content. In this study for finding the soil moisture content at field capacity and permanent wilting point for cultivated soil, point pedotransfer functions of non cultivated ...  Read More

Research Article
Response of Mentha Species to Water Deficit Stress Under Controlled Conditions

S. Nezami; S. H Nemati; H. Aroiee; A. Bagheri

Volume 26, Issue 4 , September and October 2012, Pages 1051-1063


  Although mint species are very sensitive to water deficit stress, but their reaction may be different to reduction of water in soil during growing season. In order to evaluate response of three Mentha species to water deficit stress, an experiment was carried out in a factorial-randomized design with ...  Read More