نتایج جستجو برای: diseased samples were collected from different fields of sugar beet in iran including khorasan
تعداد نتایج: 24779403 فیلتر نتایج به سال:
the purpose of this study was to examine the english language needs of medical students at tehran university of medical sciences . analysis of the needs took place for three groups: 320 undergraduate students, 30 postgraduate students and 20 university instructors. a triangulation approach to collect data was used in which a combination of the quantitative (using the questionnaires) and qualita...
the sugar beet weevil, lixus incanescens boh., is an important insect pest of sugar beet, beta vulgaris l., in razavi khorasan province. in this research, population densities of the sugar beet weevil eggs and larvae were evaluated on plants of six sugar beet cultivars including ardabili, aras, persia, flores, laetitia and rosire in an experimental field in 2011 and 2012. also, the percentage o...
abstract isolates of rhizoctonia spp., obtained from sugar beet roots and crowns with dry rot symptoms that had been collected from various sugar beet production regions in khorasan razavi province during 2008 and 2009, were investigated in this research. characterization by conventional techniques and molecular methods using species-specific primers was carried out. results showed that from 36...
the following null hypothesis was proposed: there is no significant difference between the efl students listening comprehension development receiving pictorial cues and those receiving no cuse. to test the null hypothesis, 52 male and femal freshmen students of medicine studing at iran university of medical scinces were randomly selected from a total population of 72 students. to ensure that th...
sugar beet is one of the main crops in iranthat provides primary materials for sugar industries and so, its economic aspects are very important. one of these aspects is employment; it has begged to draw policy maker attentions. nevertheless, there hasnot been any survey study on this matter in iranyet. in this study, the current value of labor use in sugar beet cultivation (direct employment) i...
autumn sugar beet sowing has priority to its spring sowing in terms of economic productivity and water use efficiency. in khorasan razavi and khorasan-e-jonobi provinces, sugar beet is only sown in spring. therefore, it is necessary to evaluate the feasibility of autumn sugar beet sowing in these regions. using geographical information systems is the best and inexpensive way to identify suitabl...
this study investigated how group formation method, namely student-selected vs. teacher-assigned, influences the results of the community model of teaching creative writing; i.e., group dynamics and group outcome (the quality of performance). the study adopted an experimental comparison group and microgenetic research design to observe the change process over a relatively short period of time. ...
abstract this research is about a longitudinal case study of english morpheme acquisition by a persian speaking child l2 learner of english (2 .9-3).the goal of this research has been discovery of the child ‘s ability in acquiring of english morphemes in a persian context while only one person (the child’ s father)has been talking to her.this child has also been exposed to english languag...
the present study aimed to investigate representation of discourse markers and metadiscourse markers in conversations and readings of general elt coursebook series used in the language centers of iran. to this aim, four elt coursebooks popularly taught in language centers of this country were analyzed based on fung and carter’s (2007) framework regarding discourse markers and hyland’s (2005) fr...
the main purpose of this research was to:1.develop a coking model for thermal cracking of naphtha.2.study coke inhibition methods using different coke inhibitors.developing a coking model in naphtha cracking reactors requires a suitable model of the thermal cracking reactor based on a reliable kinetic model.to obtain reliable results all these models shall be solved simultaneously.for this pu...
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