نتایج جستجو برای: nk603 maize

تعداد نتایج: 36581  

Journal: :بوم شناسی کشاورزی 0
مهدی دهمرده عباس کشته گر

in order to study the sowing system, row distance and weeding effect on yield and yield components of intercropped maize with peanut, this experiment was conducted, as factorial based on a rcbd with three replications at the research farm of agriculture center of zabol university (iran) during growing season 2011- 2012. sowing system were four levels including sole maize, sole peanut, 50% maize...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2012
a.b. mohammed a.f. ayanlere u. ibrahim muhammed lawal

the study assessed economic of maize production in ogori/magongo local government area of kogi state. to this end, effort was made to examine the socio economic characteristics of the maize farmers, determine the resource use efficiency, problems as well as profitability of maize production in the area. to achieve the objectives of this study 48 maize farmers where randomly selected from 5 ward...

2015
Renata Calixto Campos Malva Isabel Medina Hernández Ricardo Bomfim Machado

Dung beetle community structures changes due to the effects of destruction, fragmentation, isolation and decrease in tropical forest area, and therefore are considered ecological indicators. In order to assess the influence of type of maize cultivated and associated maize management on dung beetle communities in Atlantic Forest fragments surrounded by conventional and transgenic maize were eval...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
Jennifer L Tank Emma J Rosi-Marshall Todd V Royer Matt R Whiles Natalie A Griffiths Therese C Frauendorf David J Treering

Widespread planting of maize throughout the agricultural Midwest may result in detritus entering adjacent stream ecosystems, and 63% of the 2009 US maize crop was genetically modified to express insecticidal Cry proteins derived from Bacillus thuringiensis. Six months after harvest, we conducted a synoptic survey of 217 stream sites in Indiana to determine the extent of maize detritus and prese...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده کشاورزی 1392

در جهان امروز، چالش بزرگ در بخش کشاورزی، تولید غذای بیش تر با آب کمتر است که از طریق افزایش بهره وری آب نباتات زراعی حاصل می گردد. در پژوهش حاضر، به منظور بررسی بهره وری آب ذرت دانه ای سینگل کراس 704 با مدل های ceres-maize و aquacrop، آزمایشی به صورت کرت های خرد شده در قالب بلوک های کامل تصادفی در سه تکرار در سال زراعی 1389 در شهرستان لاهیجان انجام گردید. تیمارها شامل سه سطح آبیاری ( دیم، دور آ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زابل - دانشکده کشاورزی 1393

مدل های شبیه سازی رشد گیاهان زراعی ابزارهای مهمی در جهت ارزیابی اثرات عوامل مختلف اقلیمی و گیاهی و مدیریت زراعی بر گیاهان برای مطلوب کردن و بهبود استفاده از منابع محیطی به منظور افزایش پایداری و سوددهی تولید گیاهان زراعی می باشند. مدل های شبیه سازی همچنین ابزار مفیدی برای اصلاح مدیریت مصرف آب و نیتروژن و مطلوب کردن کارایی مصرف این دو نهاده مهم می باشند. در این پژوهش مدل ceres-maize و aquacrop ب...

2016
Fernanda F Sousa Simone M Mendes Oscar F Santos-Amaya Octávio G Araújo Eugenio E Oliveira Eliseu J G Pereira

Exposure to Bacillus thuringiensis (Bt) toxins in low- and moderate-dose transgenic crops may induce sublethal effects and increase the rate of Bt resistance evolution, potentially compromising control efficacy against target pests. We tested this hypothesis using the fall armyworm Spodoptera frugiperda, a major polyphagous lepidopteran pest relatively tolerant to Bt notorious for evolving fiel...

Journal: :Ecological applications : a publication of the Ecological Society of America 2009
Natalie A Griffiths Jennifer L Tank Todd V Royer Emma J Rosi-Marshall Matt R Whiles Catherine P Chambers Therese C Frauendorf Michelle A Evans-White

Headwater streams draining agricultural landscapes receive maize leaves (Zea mays L.) via wind and surface runoff, yet the contribution of maize detritus to organic-matter processing in agricultural streams is largely unknown. We quantified decomposition and microbial respiration rates on conventional (non-Bt) and genetically engineered (Bt) maize in three low-order agricultural streams in nort...

2005
Lauren Lewis Mary Onsongo Henry Njapau Helen Schurz-Rogers George Luber Stephanie Kieszak Jack Nyamongo Lorraine Backer Abdikher Mohamud Dahiye Ambrose Misore Kevin DeCock Carol Rubin

In April 2004, one of the largest aflatoxicosis outbreaks occurred in rural Kenya, resulting in 317 cases and 125 deaths. Aflatoxin-contaminated homegrown maize was the source of the outbreak, but the extent of regional contamination and status of maize in commercial markets (market maize) were unknown. We conducted a cross-sectional survey to assess the extent of market maize contamination and...

2005
Paul W. Armah Felix Asante

1. Research Framework and Objectives Ghana is about 99% self-sufficient in the production of maize (Nyanteng and Asuming-Bempong, 2003), the major staple for many low-income Ghanaians, yet the aggregate staple maize availability projections in Ghana does not take into account insecurity problems in the post-harvest season caused by poor storage, distribution difficulties, high prices and low in...

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