نتایج جستجو برای: crop response and principal component analysis

تعداد نتایج: 17445434  

Drought stress can play an important role in limiting crop productivity and disturbing different stages of plant growth especially at seed germination in arid and semiarid regions. Breeding for drought tolerance at germination stage can enhance the number of seedlings, resulting in a higher yield of grain in rapeseed. In this research 32 cultivars of rapeseed were evaluated for drought toleranc...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2006
keivan ansari sayed hossein amirshahi siamak moradian

a procedure for an efficient recovering of reflectance spectra of acrylic paint samples from cie tristimulus color values is described. by fixing a certain criteria based on color difference value, the proposed technique preliminarily selects a series of suitable samples from a main dataset containing the reflectance values of a series of different acrylic paint samples, based on the color spec...

Journal: :journal of rangeland science 2016
mousa akbarlou negin nodehi

medicinal plant species constitute a considerable part of the flora in iran and play a major role in the composition of plant communities. therefore, it is necessary to recognize the factors leading to the establishment and distribution of vegetation. for data sampling (2012), land units were specified. the plot size was determined using minimal area method and number of plots was determined by...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

چکیده در این پژوهش منشاء خزندگان را مورد بررسی قرار داده، خانواده های سوسماران را در ایران معرفی نموده و ویژگی های آنها را ذکر کرده ایم، علاوه بر این نکات، اهمیت تغییرات در وضعیت سیستماتیک mabuya (sensu lato) را بررسی کردیم. خانواده scincidae را از نظر فیلوژنی، رده بندی و همچنین جنس های آن را، مرور کرده ایم. جنس trachylepis fitzinger, 1843 که هدف اصلی پژوهش حاضر است در ایران دارای سه گونه می ب...

Journal: :علوم دامی 0
سید مهدی حسینی وردنجانی دانش‏آموخته کارشناسی ارشد ژنتیک و اصلاح نژاد دام پردیس کشاورزی و منابع طبیعی کرج سید رضا میرایی آشتیانی استاد گروه علوم دامی پردیس کشاورزی و منابع طبیعی کرج عباس پاکدل دانشیار گروه علوم دامی پردیس کشاورزی و منابع طبیعی کرج حسین مرادی شهر بابک استادیار گروه علوم دامی پردیس کشاورزی و منابع طبیعی کرج

the objective of this study was to investigate the relationship among body weight and fat-tail measurements with fat-tail weight by using multiple regression and principal component analysis. the eleven characters includes, body weight, fat-tail length, fat-tail circumference, width and diameters in 3 position of upper, middle and lower before the slaughter, and also fat-tail weight after the s...

2015
E. Armenise P. Rubino

Due to increasing land-use pressures, soil-quality assessment is in growing demand, thus a standard set of procedures to assign a soil quality index (SQI) would be beneficial. In this study, the effectiveness of different managements in upholding soil quality (for crop productivity) was compared using soil quality indicators incorporated systematically to determine a SQI. The managements includ...

2008
JOHN A. D. ASTON JENG-MIN CHIOU JONATHAN P. EVANS John Aston

Fundamental frequency (F0, broadly “pitch”) is an integral part of spoken human language; however, a comprehensive quantitative model for F0 can be a challenge to formulate due to the large number of effects and interactions between effects that lie behind the human voice’s production of F0, and the very nature of the data being a contour rather than a point. This paper presents a semi-parametr...

Journal: :iranian journal of pharmaceutical sciences 0
reza tabaraki department of chemistry, faculty of science, ilam university, ilam, iran negar sadeghinejad department of chemistry, faculty of science, ilam university, ilam, iran

herbal water is referred to the liquid obtained from the distillation of medicinal plants. different parts of plants, such as flowers, fruits, leaves, seeds and roots have long been used to produce herbal waters. herbal waters are used as dietary supplements and alternative medicine and are commonly used for flavoring in baking. previous studies focused on the non-volatile constituents of herbs...

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