Fatemeh Razzaghi

Fatemeh Razzaghi
Shiraz University · Department of Water Engineering

PhD

About

48
Publications
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1,249
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Publications

Publications (48)
Article
Full-text available
Iran imported around 1.3 million tons of barley in 2017. Accordingly, conducting researches under low organic matter soils and limited water resources is important to enhance barley products and improve economic conditions. Field experiments were performed to evaluate the effect of different levels of irrigation water (0, 50, 75 and 100% of crop wa...
Chapter
The abundance of information and data necessitates the formulation of a new paradigm for a more robust and efficient water management system using artificial intelligence and automated data processing. In particular, the observational data from satellites have been extensively used in monitoring agricultural and natural resources from local to glob...
Article
Under water shortage conditions, the farmers are faced with risk and uncertainty in decision making. The main objectives of this study are to selecting the well-managed deficit irrigation, the optimum plant density and appropriate planting method in order to decrease the sugar beet yield risk and water consumption risk. The gross margin (GM) and ec...
Article
Cation exchange capacity (CEC) is one of the fundamental properties of soil that indicates soil’s ability to retain exchangeable cations. Several regression-based models exist to estimate CEC from widely available or easily measured basic soil properties. However, the majority of these models do not include CaCO3 as an input variable. Consequently,...
Article
In arid and semi- arid regions selecting the appropriate planting method and irrigation regime along with optimum plant density are three critical factors that affect the yield and physiological characteristics of sugar beet. Therefore, in order to find the optimum field managements in sugar beet cultivation the split-split plot arrangement was use...
Article
This study was conducted to investigate the effects of plant density, planting method and irrigation regime on water productivity and yield of sugar beet for two years during 2017 and 2018. The planted cultivar was Shokoofa with three irrigation levels: 100%, 75% and 50% of the full irrigation (1368 mm in 2017 and 1412 mm in 2018) as I100, I75 and...
Article
Full-text available
Aim of study: To determine how much water should be used and when it should be applied in rain-fed grapevine using a cropping system simulation model (CropSyst), and also the economic analysis of supplemental irrigation for rainfed grapevine. Area of study: This study was conducted at the School of Agriculture, Shiraz University, Shiraz, Iran, in...
Article
en This study was conducted to estimate the optimal amounts of water and nitrogen of barley production under water‐ and land‐limited conditions. Two years of field experiments were performed with two treatments using a spilt plot design with three replications. The treatments included four levels of irrigation regimes (0, 50, 75 and 100% of water r...
Article
Biochar is widely suggested as a soil amendment to improve soil physical properties for crop production. However, the heterogeneity between experiments in terms of biochar characteristics, experimental conditions and soil properties makes it difficult to compare and extrapolate results from different studies. We conducted a statistical meta-analysi...
Article
Iran has been faced to drought during last decades, and one way to overcome this phenomenon is to improve the water productivity by introducing new crops tolerant to water stresses such as quinoa. Two‐year field experiment was performed to find out the response of quinoa (cv. Titicaca) to deficit irrigation imposed at different growing stages. Henc...
Article
Full-text available
A greenhouse experiment was conducted to study the effect of different irrigation levels (100%, 75%, and 50% of water requirement) and wheat straw biochar levels (0%, 1.25%, 2.5%, 3.75%, and 5% w/w) on faba bean yield, water productivity, root length density, and different ions concentration in soil solution, using a factorial arrangement in comple...
Article
This study was carried out to identify the effects of time and amount of supplemental irrigation (SI) at different distances from tree trunks on morphological characteristics and physiological responses of mature rainfed fig trees in Estahban County, Fars Province, Iran. The two-year experiment was conducted in a split-split plot statistical design...
Article
In this study, the physiological response of two cultivars of grapevine (Vitis vinifera cv. Rotabi, and Thompson seedless) was investigated under manganese treatment (manganese sulfate) and water stress conditions. In this regard, foliar application of manganese sulfate (MnSO4) treatment such as: 0, 2 and 4 g/l and water stress (WS) treatment inclu...
Article
Full-text available
Nowadays, due to limited water resources and low soil fertility, especially in arid and semi-arid regions, the use of water with low quality (such as saline water) and soil amendments such as biochar is essential. Biochar is a kind of charcoal produced from plant residue and animal manure, which improves soil physical and chemical properties due to...
Article
Greenhouse experiment was conducted to investigate the effect of different levels of irrigation water salinity (0.5, 2.5, 5 and 7.5 dS m⁻¹) and wheat straw biochar (0%, 1.25%, 2.5%, and 3.75% w/w) on growth and yield of faba been using complete randomized design with three replications. Stomatal conductance (green canopy temperature) of faba bean i...
Article
Full-text available
Effect of four levels of biochar (0, 25, 50 and 75 ton ha-1) produced from wheat straw and three levels of irrigation (100, 75 and 50 % of crop water requirement) on growth and yield of faba bean was determined in completely randomized design in the greenhouse. The result showed that after faba bean reached maturity, the maximum plant height and le...
Article
Full-text available
Background and Objectives: Salinity is one of the major environmental stresses which negatively influence the agricultural production. The saline soils usually have poor soil structure due to lack of organic matter. Therefore, application of organic matter improves soil aggregate stability, increases soil porosity and enhances soil water holding c...
Article
In this research, the SALTMED model was used for soil salinity and yield prediction using data from a tomato field experiment. Surface and subsurface drip irrigation systems were used to study the interaction of irrigation water salinity levels and irrigation management practices in a complete randomized, split-plot design with three replications i...
Article
Coarse sandy soils have poor water retention capacity, which may constrain crop growth during drought. We investigated the effect of biochar amendment to subsoil on crop physiological processes and maize yield, comparing irrigated and drought conditions. A two-year greenhouse experiment was conducted with one-time application of straw biochar at co...
Article
Potato production ranks fourth in the world after rice, wheat, and maize and it is highly sensitive to water stress. It is thus very important to implement irrigation management strategies to minimize the effects of water stress under different climate conditions. The use of modelling tools to calculate the soil water balance on a daily basis has b...
Article
Soil particle size distribution (PSD), particularly the active clay fraction, mediates soil engineering, agronomic and environmental functions. The tedious and costly nature of traditional methods of determining PSD prompted the development of water sorption-based models for determining the clay fraction. The applicability of such models to semi-ar...
Article
Clustering was used to divide dryland farming areas in western Iran into homogeneous sub-regions to identify dryland farming potential, considering drought impacts. Clustering utilized eight algorithms/four indices to detect optimal number of clusters. Ward’s algorithm validated by Silhouette index, produced the best result by detecting 7 dryland f...
Article
Supplemental irrigation, which provide minimum amount of water under rainfed farming systems, improves the physiological characteristics and yield production of plants especially in arid and semi-arid regions. However, the amount and timing of supplemental irrigation are of utmost importance and challenging with the recent drought occurrences. A tw...
Article
Olive trees have the capability of growing under semi-arid regions, where drought and salinity are the major concerns. Two years field experiments were carried out to investigate the interaction effects of natural saline well water and irrigation levels on the quantity and quality of fatty acids in the olive flesh fruits (“Roghani” cultivar). A fac...
Article
Comprehensive agricultural models are crucial for assisting several decision making processes due to their capability for use under different conditions. SALTMED is a holistic generic model, which simulates yield, dry matter and soil water content under different irrigation managements and systems. The aim of this study was to calibrate the SALTMED...
Article
Full-text available
SALTMED model has been developed to predict yield, soil salinity and water content under saline conditions. A two year field experiment was carried out during 2012-13 to calibrate and validate the model for sorghum. Plants were irrigated with salinity levels of 2, 6, 10 and 14 dS m-1. Results showed that there were significant differences between t...
Chapter
Full-text available
Quinoa thrives under a wide range of soil and climate conditions, from cold and arid areas to wet tropical regions. The adaptability of quinoa to various levels of drought is due to the differentiation of a diversity of ecotypes originating in contrasting agro-environments. Plants display various adaptive strategies to drought stress, from morpholo...
Article
Full-text available
Quinoa (Chenopodium quinoa Willd.) grown under field conditions was exposed to five irrigation water salinities (0, 10, 20, 30 and 40 dS/m; 4 : 1 NaCl : CaCl2 molar ratio) from flowering, and divided between full irrigation and progressive drought (PD) during seed filling. Quinoa demonstrated homeostatic mechanisms which contributed to quinoa’s ext...
Article
Soil structure formation is essential to all soil ecosystem functions and services. This study aims to quantify changes in soil structure and microbial activity during and after field incubation and examine the effect of carbon, organic amendment and clay on aggregate characteristics. Five soils dominated by illites, one kaolinitic soil and one sme...
Article
Sandy soils, with low productivity, could be improved by compost application to sustain crop production. This study aimed to examine the effect of three compost types (vegetable, fruit and yard waste compost, garden waste compost, and spent mushroom compost) on basic properties of a loamy sand and greenhouse tomato productivity. Disturbed and intac...
Article
Aims This study aimed to assess varietal differences of quinoa’s tolerance to salinity and to investigate physiological mechanisms conferring these differences. Methods Production of biomass in fourteen varieties grown under saline conditions was analysed in a pot experiment. For two contrasting varieties, the Danish variety Titicaca and the Boliv...
Article
Full-text available
Green access full text link: http://rdcu.be/zdgs/ Drought and salinity reduce crop productivity especially in arid and semi-arid regions, and finding a crop which produces yield under these adverse conditions is therefore very important. Quinoa (Chenopodium quinoa Willd.) is such a crop. Hence, a study was conducted in field lysimeters to investiga...
Article
Quinoa (Chenopodium quinoa Willd.) is believed to be tolerant to abiotic stress including salinity, drought and poor soil quality. To investigate the effect of soil type and soil-drying during the seed-filling phase on N-uptake, yield and water use, a Danish-bred cultivar (cv. Titicaca) was grown in field lysimeters with sand, sandy loam and sandy...
Article
Full-text available
Accurate estimation of saturated hydraulic conductivity (Ks) of technosands (gravel-free, coarse sands with negligible organic matter content) is important for irrigation and drainage management of athletic fields and golf courses. In this study, we developed two simple models for predicting Ks of technosands based on either (i) the classic Kozeny-...
Article
In this study, four different methods for reference crop evapotranspiration (ET0) were calibrated and validated for estimation of daily to mean monthly ET0 by weighing lysimeter data during 2005–2006 and 2004–2005, respectively, in a semi-arid region. The value of the constant in the Hargreaves–Samani method changed from 0.0023 to 0.0026 for daily...
Conference Paper
Full-text available
Plant growth and economic yield decreases when high salt concentrations build-up in the root zone. Quinoa is a facultative halophyte crop, which can withstand saline conditions. There is no documentation of the threshold soil electrical conductivity that cause yield reduction in quinoa under field conditions. In this study the threshold electrical...
Conference Paper
Full-text available
Quinoa (Chenopodium quinoa Willd.) is a crop with high tolerance to salinity and drought and its response to varying soil moisture and salinity levels was studied in a field lysimeter experiment. Quinoa (cv. Titicaca) was irrigated with different concentrations of saline water (0, 10, 20, 30 and 40 dSm -1) from flowering stage for 18 days (FI 0 , F...
Conference Paper
Full-text available
Quinoa is a facultative halophyte crop and can grow in extremely saline conditions. A field lysimeter experiment was carried out to investigate the effects of salt and drought on the seed yield, total biomass production (DM), harvest index (HI) and water productivity (WP) of quinoa (cv. Titicaca). Five irrigation water salinity levels (0, 10, 20, 3...
Article
Full-text available
Drought and salinity are the two major factors limiting crop growth and production in arid and semi-arid regions. The separate and combined effects of salinity and progressive drought in quinoa (Chenopodium quinoa Willd.) were studied in a greenhouse experiment. Stomatal conductance (gs), leaf water potential (Wl), shoot and root abscisic acid conc...
Conference Paper
Full-text available
Lack of precipitation, high rate of evapotranspiration and un-sustainable use of water resources cause drought and salinity problems in agriculture in semi-arid and arid regions. Therefore, introducing crops, which could cope with such environmental situations, is es-sential. Quinoa is a facultative halophyte, which is known to tolerate abiotic str...
Article
There are many equations for the estimation of reference crop evapotranspiration (ETo) by using climatic data measured in weather stations. Also, different types of lysimeter are used to measure ETo directly. However, lysimeters are not available for ETo measurement everywhere; therefore, an appropriate equation should be used for ETo estimation. F...
Article
Accurate estimation of reference crop potential evapotranspiration (ETo) is essential for optimum crop water requirement in arid and semi-arid regions. There are many empirical methods for estimating ETo that require many weather data which are not readily available, but some of the methods require only air temperature for ETo estimation. In this s...

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