Mehdi Nassiri-Mahallati

Ferdowsi University Of Mashhad | FUM · Department of Agronomy

Article type: Full Length Research Paper Background and Objectives: The importance of rapid, non-destructive, and accurate estimation of leaf area (LA) in agronomic and physiological studies is well known. The need for such estimates of leaf area in particular for leaves with unusual shapes has led to studies relating leaf dimensions and leaf area....

The goal of this study was to undertake a detailed investigation of the agroecological state of the wheat and sugar beet ecosystems on a local scale. From 2001 to 2016, a set of the most critical agroecological indicators of wheat and sugar beet farming systems in the Torbat-e Heydarieh region, northeast of Iran, were studied. Potential yield calcu...

Introduction Climate change is rapidly degrading the conditions of crop production. For instance, increasing salinization and aridity are forecasted to increase in most parts of the world. As a consequence, new stress-tolerant species and genotypes must be identified and used for future agriculture. Stress-tolerant species exist but are underutili...

Saffron Crocus sativus L. (Iridaceae) is one of the most valuable and expensive medicinal plants in the world. In order to compare the quality characteristics of saffron in Afghanistan and Iran, samples of dried C. sativus from different saffron-producing regions of Herat province (Afghanistan) and Torbat Heydarieh county (Iran) were collected in t...

Various studies have shown that natural colorants, in addition to their coloring attributes, have valuable biological effects such as antioxidant, anti‐inflammation, and anticarcinogenic properties. Moreover, their use as a food colorant can restrict the potential disadvantages of synthetic additives and turn foods into functional products. In this...

Introduction Among the approaches that have received attention in recent years to sustain agroecosystems is the identification and employment of traditional/indigenous/local knowledge and strategies of smallholder farmers around the world to solve the basic challenges of these ecosystems regarding food production. In this regard, the role and func...

The goal of this study was to undertake a detailed investigation of the agroecological state of the wheat and sugar beet ecosystems on a local scale. From 2001 to 2016, a set of the most critical agroecological indicators of wheat and sugar beet farming systems in the Torbat-e Heydarieh region, northeast of Iran, were studied. Potential yield calcu...

Introduction Intercropping as an approach for the development of sustainable agriculture systems pursues purposes such as creating ecological balance, further exploitation of resources, increasing the quantity and quality of yield reducing losses due to pests, diseases, and weeds, and reduceing the dependence of farmers to pesticides, to maintain p...

پژوهشی بهمنظور ارزیابی اثر افزایش تنوع ژنتیکی درکشت مخلوط ردیفی ارقام گندم بر بهبود کارایی استفاده از منابع در قالب طرح بلوکهای كامل تصادفي با سه تكرار و 15 تیمار در دو سال زراعی 1398-1399 و1399-1400 اجرا شد. تیمارهای آزمایش شامل کشت خالص و مخلوط های دوگانه، سه گانه و چهارگانه ارقام گندم حیدری، پیشگام، پیشتاز و فلات بود. نتایج نشان داد که اثر تیم...

Introduction In conventional agriculture, crop production has gradually shifted from ecological production principles to economic approaches, which has led to the destruction of natural resources and land use change, as well as the reduction in resource consumption (Koocheki et al., 2016b). Satisfying the nutritional needs of a growing population w...

Agricultural technology is constantly changing farm management strategies as farmers are facing with many new cultivars and pesticides and making proper efficient decision is difficult in the recent years. DSS models have been used in agriculture as decision-making tools since 1980s. Weed-related DSS have generally fallen in to one of two broad cat...

Introduction Corn is a strategic plant that is of special importance in the world due to its various uses, high quality and nutritional value (Fathi and Zeidali, 2021). Drought stress is a multidimensional stress that affects plants at different levels and affects almost all plant growth processes (Shekoofa and Emam, 2006). Meta-analysis is a metho...

Purpose Plant-Soil – “Arbuscular Mycorrhizal Fungi (AMF)” system dynamics are driven by complex arrays of simultaneous cause-effect relationships. Understanding this complexity requires high sophisticated analytical tools and methods such as Structural Equation Modeling (SEM). There has been no practical solution to determine plant-fungus coexisten...

The future climate outlook was based on a combination of CCMs based on three Representative Concentration Pathway (RCP) scenarios including RCP 2.6, RCP 4.5 and RCP 8.5 for the future period of 2021–2051. The results showed an increase of the average Tmax in June, July and August (averaged by 1.8°C compared to the observed period) and a decrease in...

Introduction Climate change is rapidly degrading the conditions of crop production. For instance, increasing salinization and aridity is forecasted to increase in most parts of the world. As a consequence, new stress-tolerant species and genotypes must be identified and used for future agriculture. Stress-tolerant species exist but are actually und...

Investigating the possibility of autumn-sown and determining the most suitable planting date and the best bolt-resistant cultivar of sugar beet in Khorasan region Shafapour H. Jahan M. Bannayan M. Nassiri-Mahallati M. Contribution from Ferdowsi University of Mashhad (FUM) Introduction Sugar beet (Beta vulgaris L.) is the second most important sug...

Recognizing the climate change (CC) can have vast impacts on agricultural production has generated a desire to create resilience into cropping systems. Crop management is the most important strategy to improve crop yield and resilience under CC. This study investigated the adaptation (changing planting date and crop rotation) effects on rainfed whe...

Introduction The nitrogen budget or balance is often evaluated by comparing various nitrogen inputs and outputs in soil– crop systems. Research on nitrogen balance can provide more detailed information on the nitrogen cycle and its losses by integrating soil nitrogen processes with the total nitrogen budgets. There are restricted researches for eva...

Quinoa is a short-day plant which is affected by the day length from flowering to seed maturity stages. Line 6 responded qualitatively to day length; however, the other lines responses were quantitatively. The study of the simultaneous effect of temperature and day length showed that temperature has a compensatory effect for day length during flowe...

In this study, for both crops, all provinces of the country were classified into three groups in terms of weed diversity. In general, the diversity of weeds in wheat fields was more than sugar beet. Differences in crop management practices (fertilization and use of pesticides) are the most important determinants of weed species composition and cons...

Introduction Predicting yield is increasingly important to optimize irrigation under limited available water to enhance sustainable production. Calibrated crop simulation models therefore increasingly are being used an alternative means for rapid assessment of water-limited crop yield over a wide range of environmental and management conditions. Aq...

Extended abstract Introduction A prerequisite to model crop growth is an appropriate quantification of crop canopy structure in response to management and environmental conditions. Under water stress, the light distributions over canopy depth are more complicated because water stress affects not only appearance and elongation of leaves, but also mo...

Extended abstract Introduction: Purple nutsedge (Cyperus rotundus L.) is one of the problematic weeds worldwide prevalent in tropical and subtropical regions. Tubers are the major organs through which purple nutsedge is propagated, whereas its seeds have a low ability to germinate. Therefore, evaluation of the response of tubers against environmen...

Determination of cardinal temperatures and photoperiodic response of Quinoa (Chenopodium quinoa L.) lines using linear and nonlinear models S. Eghbali, M. Jahan1*, M. Nassiri-Mahallati, M. Salehi Introduction The length of the growth period is the key to crop adaptation to new environments. It is strongly affected by the environment in such a way t...

Production and processing technologies of saffron

This study was conducted as a two-year field experiment with aim of the simulation of growth and development of tomato using AquaCrop model under different irrigation regimes at two growth stages in Mashhad climatic conditions. In this experiment, split plot design with three replicates was adopted with different amount of applied water at vegetati...

Tubers are the main means of propagation in purple nutsedge (Cyperus rotundus L.), one of the most troublesome weeds competing in crop and pasture systems throughout the world. Tuber sprouting is highly linked to temperature, the main environmental factor limiting the growth of purple nutsedge. In the present study, a new thermal time model was dev...

Study the response of phenological stages of quinoa lines to temperature and photoperiod regimes Introduction One of the important factors in the adaptation of plants to new environmental conditions is the appropriate response of development stages to temperature and photoperiod regimes. The thermal time, growing degree day (GDD) or heat unit conce...

The use of cultivated plants in the consecutive of cropping systems is one of the most important alternative and sustainable methods to eliminate or reduce the use of herbicides. To investigate the effect of crop residues on weed control and corn yield of NS640 cultivar, an experiment was conducted in 2015-2016 and 2016-2017 cropping years. This ex...

The expression of genes that control germination-related processes in corn (Zea mays L.) is influenced by environmental factors. Germination of seeds may be facilitated by hormonal priming. The purpose of this investigation was to quantify the effects of different germination temperatures [(5, 10, 15, 20, 25, 30, 35, and 40°C), NaCl-induced stress...

Prickly lettuce is a drought-tolerant weed native to Asia Minor and common in Mediterranean climates. It is a strong competitor with crops for water because of its deep taproot. The purpose of this investigation was to determine the effect of different constant temperatures (3, 5, 7, 10 15, 20, 25, 30, 35, 40 and 45 o C) and water stress (water pot...

Introduction8 The nitrogen budget or balance is often evaluated by comparing various nitrogen inputs and outputs in soil– crop systems. Research on nitrogen balance can provide more detailed information on the nitrogen cycle and its losses by integrating soil nitrogen processes with the total nitrogen budgets. There are restricted researches for ev...

Quantification of the effects of water consumption technologies on sesame performance has not been evaluated by any model yet. Field experiments were conducted to assess the sesame (Sesamum indicum L.) response to limited irrigation in an arid region. Experimental factors were irrigation levels (deficit and full irrigation; DI, FI respectively), ap...

Introduction: Wheat breeders have been constantly striving to develop new varieties with improved productivity and yield as well as higher resistance to pests and diseases. These varieties are being released frequently and replace the existing ones on the basis of their performance under open-field conditions. Intercropping has been widely applied...

Superabsorbent polymers (SAPs) have shown to be quite effective and useful in acting as a reservoir for water and some nutrients in arid and semiarid regions. There are many studies in Iran that have been performed in relation to SAPs and their useful application in agriculture; however, there is still a lack of its applied definition in arid regio...

Increasing resources use efficiency in intensive cultivation systems of maize (Zea mays L.) can play an important role in increasing the production and sustainability of agricultural systems. The objectives of the present study were to evaluate DM yield and the efficiency of inputs uses under different levels of water, nitrogen (N) and phosphorus (...

Fertilizers utilization does not only play an important role in increasing the crop yield, but also they may influence the plant nutritional quality, thereby it affects the ecological interactions between herbivores and their natural enemies. In a field study, the effect of nitrogen fertilization (0, 75, 150 and 225 kg N ha−1) on population of must...

Since the early 1970s, mathematical models have been widely used at different spatial and temporal scales to gain insight into many diverse aspects of crop growth and development. However, these models were chiefly developed for main crop species and the application of modeling approaches for local crops has been overlooked. Undoubtedly mathematica...

Nitrogen is one of the most important nutrients and plays a major role in crop yield improvement. Currently,under the global pressure to increase grain yield while simultaneously minimizing environmental risks, the nitrogen use efficiency has become a challenging issue. Corn (Zea mays L.) nitrogen use is of continued interest due to agronomic perfo...

Wheat breeders have been constantly striving to develop new varieties with improved productivity and yield as well as higher resistance to pests and diseases. These varieties are being released frequently and replace the existing ones on the basis of their performance under open-field conditions.Intercropping has been widely applied to reduce soil...

Life cycle assessment (LCA) is a well-known and accurate methodology for comparison of environmental impacts of activities including different agricultural management systems. Since the used inputs have an important role in environmental pollution and greenhouse gas emissions, LCA have been extensively applied for crop species. This study was condu...

Nowadays, excessive use of agricultural inputs not only imposes extra costs to production systems but also has been led to environmental pollution. In order to determine the optimal application rates of nitrogen and water in wheat cultivation, a field experiment was conducted based on central composite design in research field of Ferdowsi Universit...

Yield increase in the second half of the last century was attributed to breeding new high yielding cultivars and use of chemical inputs, particularly nitrogenous fertilizer, where contribution of fertilizers in yield improvement has been reported in the range of 30 to 50 percent. In fact, genetic potential of high yielding cultivars is achieved usi...

Potential production condition is defined as situation where water and nutrients are supplied in ample with no damage from weeds, pests and diseases. Under this situation potential yield (Yp) which is defined by solar radiation, temperature, CO2 concentration and genotypic characteristics of the crop species could be achieved. Closing the gap betwe...

To realize global food demand by 2050 world cereal production should be increased up to 49% compared to 2006. This level of production could be achieved by annual yield increment of 1.16%. However, the current rates are much lower. At the same time, there is a very restricted area to increase cultivated lands because of resource limitation, provide...

Climate change is expected to lead to declining crop yields in semi‐arid regions due to higher temperatures and more severe droughts, which calls for adaptations in crop management. We used the WOFOST and AquaCrop crop simulation models to examine the response of crop yield in winter wheat and maize to a set of climate change scenarios up to 2040 i...

Introduction Carbon sequestration is defined as the permanent gain of carbon by soil, plant or water. Soil as the largest terrestrial carbon pool plays an important role in the global carbon cycle. Due to the role of agricultural systems in CO2 emission, attention to the carbon cycle in agricultural systems is of prime importance. So, the interest...

A comprehensive evaluation of crop simulation models with adequate data sets from different environments, management, cultivars, and soil types is critical in order to use a crop model with confidence in agricultural systems analysis. Nwheat model which recently integrated into DSSAT was evaluated for four wheat cultivars using observations from fi...

پظ ؾٍّ حبهش ثب ذّف فشاتحلیل تًبیح پظ ؾٍّ بّی ك سَت گشفت دس و سَ پبػخ ث ایي ػو اَ و لو ی وو ییوب ووبسثشد ایوي هو اَد ثو وً سَ ولوی ه فَمیت یهیض ث دَ یب خیش اگش ه فَك ث دَ چ همذاس اص یى لبثل ت كَی اػت، ك سَت گشفت. ثشای ا دًبم ایي پظ ؾٍّ، همبل بّی ه تٌشؿذ ثب ه هَ تأثیش همبدیش هختلف ػ پَشخبرة س ثًَت ثش وٓلىشد اخضای وٓلىشد گیب بّى صسا یٓ )ؿبهل غلات، حج...

N utilization efficiency was higher in all treatments when nitrogen productivity was calculated using grain yield.

Background: The current knowledge does not prepare a precise scientific tool for quantifying the effects of inputs particularly ecofriendly inputs such as superabsorbent polymer (SAP) and humic acid (HA) are being used to increase soil fertility, improve crop performance and finally food production. This study was designed and conducted aimed to su...

Introduction Nitrogen is one of the most important nutrients and plays a major role in crop yield improvement. Currently, under the global pressure to increase grain yield while simultaneously minimizing environmental risks, the nitrogen use efficiency has become a challenging issue. Corn (Zea mays L.) nitrogen use is of continued interest due to a...

Increasing species diversity through intercropping can be effective in improving the ecosystem functions and services. In this experiment, three different functional groups, soybean (Glycine max) as a C3 and fixing nitrogen plant, corn (Zea mays) as a C4 and nitrogen-demanding crop and marshmallow (Althaea officinalis) as a perennial medicinal plan...

An experiment was conducted at the Agricultural Research Station, Ferdowsi University of Mashhad during two successive cropping years of 2014-2015 and 2015-2016. The experimental factors were arranged as split plots based on a randomized complete block design with three replications. The main plot factor was consisted of sole culture of maize and b...

Introduction Nitrogen fertilizers, plays an essential role in crop production and additionally its application has environmental drawbacks. So, nitrogen dynamics between cropping systems and environment is one of the most important agronomic management practices. Improving nitrogen use efficiency (NUE) is an important target in wheat cropping syste...

Interaction of binary mixture of the two sulfonylurea herbicides: foramsulfuron or nicosulfuron with 2,4-D + MCPA, was evaluated in greenhouse experiments during 2010 and 2011 applying the additive dose model. Plants of redroot pigweed, common lambsquarters, common purslane and black nightshade were sprayed with seven doses of herbicides alone and...

This study was aimed to investigate radiation absorption and use efficiency in substitution intercropping of milk thistle (Silybum marianum L.) and fennel (Foenicolum vulgar L.). The experiment was set up with five treatments in a randomized complete block design with three replications at the farm of the faculty of agriculture, Ferdowsi University...

At global level nitrogen (N) fertilizers had drastic effects on crop yields increment during the last century. However, high application rates of this input have resulted to environmental pollution all around the world in addition decreased yields per unit of applied N is also reported in some countries. To fulfill increasing demands for agricultur...

In conventional crop management systems fields are considered as a homogenous environment however, because of high within field spatial variability such management is economically inefficient and provides drastic environmental consequences. Crop yield at any point of a field is a function of factors including planting density, weather conditions, m...

Sustainable agricultural development is an important goal in economic planning and human development worldwide. A range of processes and relationships are transformed, beginning with aspects of basic soil structure, organic matter content, and diversity and activity of soil biota. Eventually, major changes also occur in the relationships among weed...

Climate change (CC) is one of the most important issues of concern for mankind in the current century. Increasing CO2 concentration and the proof of the greenhouse effect theory in which the type and composition of atmospheric gases influence on earth temperature, are among undeniable facts makes the future climate change more possible (23, 25). Im...

The increasing global demand for food requires a sustainable intensification of crop production in low-yielding areas. To improve crop production needs to estimate spatially explicit identification of yield gaps (Yg), i.e., the difference between yield potential (Yp) and actual yield (Ya). Quantifying Yp and Yg is essential for prioritising researc...

Introduction The impact of agronomy on the subsequent product in rotational cropping systems depends on factors such as plant type, duration of crop growth, soil moisture content, tillage type, irrigation method, the amount of nitrogen fertilizer, quantity and quality of returned crop residues to the soil. Prior cultivated crops improve the next cr...

Core Ideas Sulfonylurea herbicides mixed with 2,4‐D + MCPA control redroot pigweed effectively. Foramsulfuron mixed with 2,4‐D + MCPA controlled weeds better than nicosulfuron. Yield did not decrease in treatments by higher ratios of 2, 4‐D + MCPA. Yield decreased in sulfonylurea herbicides applied alone. Redroot pigweed ( Amaranthus retroflexus L...

In order to study the effects of desert dust on yield and yield components of cowpea, two field experiments were conducted in the factorial layout based on randomized complete block design with three replicates in Dezful and Mashhad, Iran in 2015. The experimental treatments were combinations of desert dust in three levels (0, 500 and 1500 µg m⁻³),...

Introduction Soil organic matter is one of the main sources of carbon, nitrogen, phosphorus and sulfur and the agronomic value of organic materials depends on their nitrogen release. Nitrogen dynamics varies considerably depending on soil properties (e.g. soil texture and moisture content), residue location (incorporation or surface placement resid...

Harvesting time is one of the most important factors affecting the seed quality. In order to determine the effects of harvesting time on quantity and quality of Plantago major seeds, two experiments were carried out in the Ferdowsi University of Mashhad in 2014. In the first experiment six plantain ecotypes (Birjand, Ghaen, Torbat Heydarieh, Mashha...

Harvesting of medicinal plants from their natural habitats, put them in danger, hence their domestication is needed. In this context, knowledge of the properties of these plants, including the cardinal germination temperatures are necessary. In order to determine the cardinal temperatures and the effect of temperature on the percentage and rate of...