Research Paper
Water Quality Effect on Yield and Yield Components of Four Genotypes of Safflower

a n; t m; m.b kh; a a

Volume 31, Issue 3 , December 2017, Pages 301-313

https://doi.org/10.22092/jwra.2017.113668

Abstract
  The present study was conducted with the aim of investigating the effect of water quality on safflower yield and yield components. The experiment had two factors including water salinity at two levels (S1= 1.8 dS m-1 and S2= 5.8 dS m-1) and landrace genotypes of safflower (G1= Dizaj Hossein Beig- Marand, ...  Read More

Research Paper
Effects of Different Amounts of Irrigation Water on Yield and Quality of Two Varieties of Date Palm under Subsurface Drip Irrigation

n s; h d; a d

Volume 31, Issue 3 , December 2017, Pages 315-328

https://doi.org/10.22092/jwra.2017.113669

Abstract
  Application of advance irrigation methods to a proper utilization of water resources is inevitable. The effects of different amounts of irrigation water on yield and quality of two varieties of date palm under asubsurface drip irrigation were studied in Behbahan Agricultural Research Station during two ...  Read More

Research Paper
Lysimertic determination of Water Requirement and Crop Coefficient of Date Palm in Vegetative Growth Phase

Majid Alihouri

Volume 31, Issue 3 , December 2017, Pages 329-340

https://doi.org/10.22092/jwra.2017.113670

Abstract
  It is necessary to determinate of crop water requirement for optimum use of agricultural water resources. This research was carried out for determining water requirement and crop coefficient of Barhee date palm in the first to third year of vegetative growth. A drainage lysimeter was used to measure ...  Read More

Research Paper
Evaluation of Aqua Crop Model in Simulating Barley Biomass Production under Deficit Irrigation

Habib Karimi Avargani; Ali Rahimikhoob; Mohammad Hadi Nazarifar

Volume 31, Issue 3 , December 2017, Pages 341-353

https://doi.org/10.22092/jwra.2017.113671

Abstract
  Crop Simulation models are used for water management in farms and are widely used for optimization of water use efficiency. AquaCrop model, developed by FAO, is based on yield response to water. Compared to other similar models, AquaCrop requires fewer input parameters. The objective of this study was ...  Read More

Research Paper
Effect of Irrigatio Amount on Some Reproductive Characteristics of Olive Varieties in Kermanshah Province

Abolmohsen Hajiamiri; Abolmohsen Hajiamiri

Volume 31, Issue 3 , December 2017, Pages 355-375

https://doi.org/10.22092/jwra.2017.113672

Abstract
  Evaluation of fruit trees response to water is one of the important strategies in irrigation management. Current study was conducted in order to assess the response of five olive commercial cultivars to three levels of irrigation. The study was conducted in Olive Research Station, in Dallaho Kermanshah ...  Read More

Research Paper
Evaluation of the Effect of Drought on Germination, Growth, and Fruit Yield of Okra (Abelmoschus esculentus)

h e; a a

Volume 31, Issue 3 , December 2017, Pages 377-388

https://doi.org/10.22092/jwra.2017.113673

Abstract
  This research was carried out to evaluate the effect of drought on germination, growth, and fruit yield of okra in laboratory and field. Laboratory experiment was conducted as a two-factor factorial in agricultural laboratory of Khuzestan Payame Noor University based on completely randomized design in ...  Read More

Research Paper
Lysimetric Determination of Ajwain ( Trachyspermum ammi) Crop Coefficients during Different Growth Stages in Birjand Area

Elham Saberi; fateme rezaei; a kh

Volume 31, Issue 3 , December 2017, Pages 389-398

https://doi.org/10.22092/jwra.2017.113674

Abstract
  Detailed estimation of evapotranspiration is required for water balance studies, water utilities, design and management of irrigation conveyance systems and water resources management, and other purposes. In this study, crop coefficients and water requirements of Ajwain, which is one of the most important ...  Read More

Research Paper
Effects of Different Irrigation Amounts on Yield and Quality Parameters of Flue-Cured Tobacco Nicotiantobaccum (cv. K326) in MazandaranProvince

hamed zamani; d a; h m; f a

Volume 31, Issue 3 , December 2017, Pages 399-412

https://doi.org/10.22092/jwra.2017.113675

Abstract
  In order to investigate the effects of different irrigation regimes on yield quantity and quality of flue-cured tobacco cv. K326, an experiment was carried out based on a randomized complete blocks design (RCBD) with three replications, at Tirtash Tobacco Research Center, in 2011. Treatments were combination ...  Read More

Research Paper
Evaluation of Performance of Qanats and Irrigation in Their Downstream Lands in Semnan Province

Nader Naderi; f a

Volume 31, Issue 3 , December 2017, Pages 413-424

https://doi.org/10.22092/jwra.2017.113676

Abstract
  Qanat is one of the most surprising structures that is used for extraction of underground water in arid and semi-arid regions. There are 607 qanats in Semnan province, providing a total discharge of 93.5 million m3 of water per year. In this research, existing conditions and irrigation in agricultural ...  Read More

Research Paper
Seepage Estimation in Water Conveyance Canals by Emirical Equations and SEEP/W model

Ehsan Tavakoli; Behzad Ghorbani; m r; h s; b gh

Volume 31, Issue 3 , December 2017, Pages 425-440

https://doi.org/10.22092/jwra.2017.113677

Abstract
  Increasing conveyance efficiency and reducing water loss in distribution canals are very important. The current study aimed at investigating and comparing empirical equations and SEEP/W model for estimating seepage of earth channels. For this study, the earth canal of Boldaji, constructed in loamy soil ...  Read More

Research Paper
Non-Linear Programming and Particle Swarm Optimization Model for Management of Conjunctive Use of Wastewater and Groundwater in Varamin Plain

maryam yousefi; Mohammad Ebrahim Banihabib; jaber soltani; abbas rouzbahani

Volume 31, Issue 3 , December 2017, Pages 441-454

https://doi.org/10.22092/jwra.2017.113678

Abstract
  To address farmers’ as well as water resources and environment managers’ opinions, it is necessary to develop the optimal cropping pattern models for maximizing farmers’ benefits, reducing nitrogen leaching, and improving the rate of aquifer recharge by applying quantitative-qualitative ...  Read More

Research Paper
Factors Affecting Adoption of New Irrigation Systems: Viewpoints of Experts of Departments of Agriculture Jihad in Tehran and Alborz Provinces

ali akbar mohammadi; h a

Volume 31, Issue 3 , December 2017, Pages 455-468

https://doi.org/10.22092/jwra.2017.113679

Abstract
  Shortage of water is one of the main factors limiting development of agricultural activities. This has led to the fact that farm management and productivity of agricultural water need full participation of farmers. Therefore, the purpose of this study was to analyze the factors affecting barriers and ...  Read More

Research Paper
Evaluation of Infiltration Equations Considering Irrigation Water Quality, Initial Soil Moisture, and Constant Water Head

Ali Javadi; b m; m sh; m m

Volume 31, Issue 3 , December 2017, Pages 469-482

https://doi.org/10.22092/jwra.2017.113680

Abstract
  In order to design or evaluate an irrigation system, the infiltration phenomenon and its variations should be determined accurately. In saline and sodic soil and water conditions, the importance of this issue will become greater. The main objective of this study was to estimate the coefficients of different ...  Read More

Research Paper
Simulation of Leaf Area Index for Corn, cv. Single Cross 704, in Drought Stress Conditions

Nader Kouhi Chellehkaran; h d

Volume 31, Issue 3 , December 2017, Pages 383-491

https://doi.org/10.22092/jwra.2017.113681

Abstract
  Crop growth models facilitate management of irrigation water and fertilizer because less on-site (filed) visits and direct measurements are required. On the other hand, these models are complex and difficult to be understood and require input data that is not available, thus, using them in management ...  Read More

Research Paper
Impact of Long-Term Irrigation with Kermanshah Municipal Treated Wastewater on Some Soil Physical Properties

m f; h gh; Meghdad Pirsaheb; Nazir Fatahi

Volume 31, Issue 3 , December 2017, Pages 493-508

https://doi.org/10.22092/jwra.2017.113682

Abstract
  Crisis of renewable water resources and rising demand for access to fresh water in arid and semi-arid countries is increasing. Therefore, it is indispensable to conserve water resources with high quality for urban purposes and drinking and use water resources with lower quality (such as treated wastewater) ...  Read More