نتایج جستجو برای: uniformity of germination

تعداد نتایج: 21166532  

Journal: :Journal of agriculture and crops 2022

This study aimed to investigate the effects of priming treatments on germination indices soybean cultivars under osmotic stress in a completely randomized design with factorial arrangement botany laboratory located Kordestan Province, Sanandaj, Iran. Experimental included three (control and gibberellin at concentration 0.04%), cultivar (Clark Hobbit), -1.5MPa) replications. The standard test wa...

Chemical Vapor Deposition (CVD) is one of the most important methods for producing Carbon Nanotubes (CNTs). In this research, a numerical model, based on finite volume method, is investigated. The applied method solves the conservation of mass, momentum, energy and species transport equations with aid of ideal gas law. Using this model, the growth rate and thickness uniformity of produced CNTs,...

ژورنال: مرتع 2022
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Background and objectives: Iron and related mineral industries are one of the important pillars in industrial development. Extraction of iron ore and steel production is not possible without land degradation, and in this processing, in addition to steel, is a large volume of mineral tailings will be produced that, if not properly managed, will be able to pollute soil, air, and water, that can p...

Journal: Desert 2012
A. Malekian A. Sadeghipour H. Azarnivand H. Joneidi Jafari

Salinity is one of the environmental factors that have a critical influence on the germination of seeds and plant establishment. Salinity affects imbibition, germination and root elongation. In this study, the germination characteristics of Matricaria comomilla and Thymus deanensis were studied. The purpose of this study was to investigate the effect of salinity on germination of these species....

ژورنال: علوم آب و خاک 2015
برومند نسب , سعید , بهزاد, مجید , رحمت‌آبادی, وحید , سخایی‌راد, حسین ,

In order to increase the distribution uniformity of sprinkler irrigation systems, some influential parameters such as wind speed, arrangement, space and type of sprinklers must be studied and controlled. In this study, a set of experiments were conducted based on ISO 7749/2(1990) standard to evaluate the ADF 250 and Nelson, F80APV sprinklers. To study the effects of wind velocity, operating pre...

2004
J. Bradford David W. Still

Hydrotime is a way to describe the relationship between water potential (ψ) and seed germination rates and percentages. The minimum ψ that allows germination to be completed is called the base water potential (ψb). The germination rate (inverse of time to radicle emergence) increases linearly as the seed ψ increases above ψb to its maximum rate in water (ψ = 0 MPa). As ψb values vary among indi...

The physiological process of germination depends on several environmental factors such as temperature, water potential, light, nutrients and smoke. Water and temperature are determinant factors for seed germination. Both factors can, separately or jointly, affect the germination percentage and germination rate. The effect of temperature on germination and water potential on germination canoften...

Journal: :علوم گیاهان زراعی ایران 0
عباس هاشمی دانشجوی کارشناسی ارشد علوم و تکنولوژی بذر، پردیس کشاورزی و منابع طبیعی دانشگاه تهران رضا توکل افشاری استاد گروه زراعت و اصلاح نباتات، دانشکده کشاورزی دانشگاه فردوسی مشهد لیلا تبریزی استادیار گروه علوم باغبانی و فضای سبز، پردیس کشاورزی و منابع طبیعی دانشگاه تهران

this study was conducted to investigate the effects of different temperatures on seed germination of plantago ovata and also to evaluate cardinal temperatures. various constant temperatures (5, 10, 15, 20, 25, 30 and 35ºc) were conducted in a completely randomized design with four replications. the germinated seeds were counted every day and the rate of germination percentage, cumulative germin...

In order to study the effect of seaweed extract and nano-ZnO on germination characteristics of tomato seed, a factorial experiment was conducted based on a randomized complete block design. Preliminary germination and seedling growth tests were performed to determine the best concentration of seaweed extract and nano-ZnO. Experimental treatments included three levels of drought stress (0, 2- an...

In order to study drought stress effect at the reproductive stage on seed germination characteristics of seven rice genotypes, an experiment was carried out at Sari Agricultural Sciences and Natural Resources University in 2014. This study was conducted on drought-stressed seeds and seeds grown under normal conditions. The results of orthogonal mean comparison among non-stressed seeds showed th...

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