نتایج جستجو برای: nitrogen application rates

تعداد نتایج: 1280718  

Journal: :بوم شناسی کشاورزی 0
رقیه حسن پور همت اله پیردشتی محمد علی اسماعیلی ارسطو عباسیان

recently, biofertilizer application is growing to meet sustainable agriculture goals. the present experiment was designed to evaluate four nitrogen levels (0, 60, 90 and 120 kg n.ha-1) as main plots, two supernitroplus biofertilizer levels) with and without biofertilizer) as sub-plots on yield and yield components of three sesame cultivars (naz, oltan and varamin (as sub-sub-plots in a split-sp...

اصغری, جعفر, مرادی , پرستو, ابراهیم پورلیش, آمنه , سمیع زاده , حبیب الله ,

In order to determine the optimal rates of Pertilachlor and Sunrice­-plus herbicides for weed control of rice (Oryza sativa Var.Tarom Hashemi), a factorial experiment was conducted with a randomized complete block design with four replications in Rice Research Farm of Faculty of Agriculture, University of Guilan, Rasht, northern Iran. The first factor was weed control treatment which   consiste...

Journal: :تولید گیاهان زراعی 0
مرضیه پورعزیزی دانشجوی کارشناسی ارشد گروه اگرواکولوژی، دانشگاه شهرکرد سیف اله فلاح دانشیار گروه اگرواکولوژی، دانشگاه شهرکرد رامین ایرانی پور استادیار مرکز تحقیقات کشاورزی و منابع طبیعی شهرکرد

in order to evaluate different sources and rates of nitrogen on dry matter yield, concentration and uptake of primary macronutrients (nitrogen, phosphorous and potassium) in forage sorghum (hybrid of speedfeed), three levels of nitrogen (80, 160 and 240 kg n ha-1) from three n sources (urea fertilizer, cattle manure and equal combination of urea fertilizer + cattle manure) and the control (no f...

ژورنال: علوم آب و خاک 2011
رضا تقی‌زاده, , و رئوف سیدشریفی, ,

In order to evaluate the effects of nitrogen fertilizer levels on grain yield and nitrogen use efficiency in corn cultivars, a split plot experiment based on randomized complete block design with three replications was conducted at the Research Farm of Islamic Azad University of Ardabil during 2006-2007 cropping seasons. Factors consisted of nitrogen fertilizer at four levels (0, 80, 160 and 24...

Journal: :حفاظت گیاهان 0
حسینی حسینی راشد محصل راشد محصل نصیری محلاتی نصیری محلاتی حاج محمدنیا قالی باف حاج محمدنیا قالی باف

abstract in order to evaluate the influence of nitrogen application and duration of weed interference on corn (zea mays l.) yield and yield components, a field study was conducted in 2004 at the ferdowsi university of mashhad research field. the experimental design was a randomized complete block with a factorial treatment arrangement replicated three times. nitrogen fertilizer was applied at r...

1999
V. HAAHR R. N. JØRGENSEN A. JENSEN

Yield mapping of crops obtained by harvest with a combine equipped with yield metering device and GPS positioning system, has in recent years, become an important tool in crop management. With respect to nitrogen fertilisation, it is now technically possible to change practices from uniform application to differentiated, site-specific application. The presentation introduces and discusses a met...

Journal: :journal of herbal drugs 0
adel poshtdar department of agronomy, ramin agriculture and natural resources university of khouzestan, khouzestan, iran alireza abdali mashhadi department of agronomy, ramin agriculture and natural resources university of khouzestan, khouzestan, iran foad moradi agricultural biotechnology research institute of iran, karaj, iran; seyed ata siadat department of agronomy, ramin agriculture and natural resources university of khouzestan, khouzestan, iran abdolmehdi bakhshandeh department of agronomy, ramin agriculture and natural resources university of khouzestan, khouzestan, iran

background & aim:peppermint known for its healing properties is a plant from the labiatae family. currently, different rates of nitrogenous fertilizers are used in production of peppermint while there is no precise information available about how much of nitrogen fertilizer is the optimum rate for this plant. the main purpose of this research was to evaluate the response of peppermint chemical ...

Journal: :به زراعی کشاورزی 0
سمانه اسدی صنم دانشجوی دکتری، گروه زراعت و اصلاح نباتات، دانشکدة علوم کشاورزی، دانشگاه گیلان، رشت، ایران محسن زواره استادیار، گروه زراعت و اصلاح نباتات، دانشکدة علوم کشاورزی، دانشگاه گیلان، رشت، ایران حسن شکری واحد مربی پژوهش، بخش خاک و آب، مؤسسة تحقیقات برنج کشور، رشت، ایران پریسا شاهین رخسار مربی پژوهش، بخش فنی و مهندسی، مرکز تحقیقات کشاورزی و منابع طبیعی گیلان، رشت، ایران

a randomized complete block design with three replications was performed in rice research institute of iran, rasht in 2008, to find the effect of supplement foliar application of nitrogen and potassium on ’daylam‘ hybrid rice grain yield, its components and grain protein percentage. foliar application of 20 kg nitrogen (5 percent n) and 15 kg potassium (3 percent k2o) in different pre-anthesis ...

Journal: :پژوهش های زراعی ایران 0
سارا اسدی امیر آینه بند افراسیاب راهنما قهفرخی

optimum management of intra- and interspecific competitions are key subject in most agroecosystems. the objective of this experiment was the study effect of intra- and interspecific competitions and n rates on yield and yield components of wheat which was carried out in agricultural faculty of shahid chamran university of ahvaz during 2011-2012. the experimental design was split–plot based on r...

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