نتایج جستجو برای: concerning weed biomass and density reduction and change in corn grain yield

تعداد نتایج: 21847884  

Journal: :پژوهش های حبوبات ایران 0
نورعلی ساجدی سجاد حیدری محمد جواد مدنی

introduction bean is one of the most important legumes worldwide for direct human consumption and is a rich source of protein and carbohydrates. bean is weak to compete with weed because of the retard growth at the early stages. therefore, weed control at this time plays an important role to gain high priduction. yield crop depends on weed number, and size after germination. weed control depend...

A study was carried out over 2 years (2008/2009 and 2009/2010) in Greece, in order to evaluate the weed control using reduced rates of the herbicide mesosulfuron-methyl+iodosulfuron-methyl-sodium of four major weeds (Avena sterilis, Phalaris minor, Papaver rhoeas and Sinapis arvensis), grain yield and yield components of five wheat cultivars (Bob, Cosmodur, Meridiano, Quadrato and Simeto). The ...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم 1393

in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...

Journal: :پژوهش های زراعی ایران 0
علی قنبری مهدی افشاری علی اصغر محمدآبادی

in order to examine of the weed damage on corn and determination of the most suitable index for corn (zea mays l.) yield reduction in field condition and multi-species weed competition, an experiment as an interval mapping was carried out in the researching field of mashhad university during 2008-2009. treatments were complete control (pre-planting treflan and hand weeding), no control (no herb...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

a one dimensional dynamic model for a riser reactor in a fluidized bed catalytic cracking unit (fccu) for gasoil feed has been developed in two distinct conditions, one for industrial fccu and another for fccu using various frequencies of microwave energy spaced at the height of the riser reactor (fccu-mw). in addition, in order to increase the accuracy of component and bulk diffusion, instanta...

جوانشیر, عزیز, راعی, یعقوب, سیدشریفی, رئوف , شکیبا, محمدرضا, قاسمی گلعذانی, کاظم, محمدی, سید ابوالقاسم,

In order to study yield component and determinate the contribution of stem reserves to corn yield under effect of different densities and interference periods of sorghum, a factorial experiment based on randomized complete block design with three replications was conducted in 2002 on the Research Farm of the Faculty of Agriculture Tabriz University. Experimental factors were sorghum interferenc...

Journal: :تولید گیاهان زراعی 0

in order to evaluate the effect of row space and weed management on weed population, chickpea yield and yield components, a factorial experiment based on rcbd with three replications was conducted at field research of agriculture college of lorestan university in cropping season of 2006-2007. in this research experimental factors were chickpea row spaces with four levels (15, 20, 30 and 40 cm w...

ژورنال: علوم آب و خاک 2009
جوانشیر, عزیز, راعی, یعقوب, سیدشریفی, رئوف , شکیبا, محمدرضا, قاسمی گلعذانی, کاظم, محمدی, سید ابوالقاسم,

In order to study yield component and determinate the contribution of stem reserves to corn yield under effect of different densities and interference periods of sorghum, a factorial experiment based on randomized complete block design with three replications was conducted in 2002 on the Research Farm of the Faculty of Agriculture Tabriz University. Experimental factors were sorghum interferenc...

Journal: :تولید گیاهان زراعی 0
عباس فروغی دانشجوی کارشناسی ارشد گروه زراعت، دانشگاه علوم کشاورزی و منابع طبیعی گرگان جاوید قرخلو استادیار دانشگاه علوم کشاورزی و منابع طبیعی گرگان فرشید قادری فر استادیار دانشگاه علوم کشاورزی و منابع طبیعی گرگان

abstract in order to investigate the effect of crop row spacing and cocklebur (xanthium strumarium) densities on yield and its components of two sesame cultivars, a field experiment was conducted in 2009-2010 growing season at research farm of university of agricultural sciences and natural resources of gorgan, iran. the experiment was established as factorial arrangement using a randomized com...

ژورنال: علوم زراعی ایران 2022

This study was conducted to evaluate the performance of different herbicides options for weed control in chickpea and their residual effect on bread wheat performance in crop rotation under rainfed conditions. The experimental design was randomized complete block with four replications conducted in Mahidasht Agricultural Research Center located in Kermanshah province, Iran during 2018-2019 and ...

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