نتایج جستجو برای: agronomic management

تعداد نتایج: 859407  

2015
Jingting Zhang Wei Ren Pingli An Zhihua Pan Liwei Wang Zhiqiang Dong Di He Jia Yang Shufen Pan Hanqin Tian P.C. Abhilash

It has long been concerned how crop water use efficiency (WUE) responds to climate change. Most of existing researches have emphasized the impact of single climate factor but have paid less attention to the effect of developed agronomic measures on crop WUE. Based on the long-term field observations/experiments data, we investigated the changing responses of crop WUE to climate variables (tempe...

2017
Rimena R Domingues Paulo F Trugilho Carlos A Silva Isabel Cristina N A de Melo Leônidas C A Melo Zuy M Magriotis Miguel A Sánchez-Monedero

Biochar production and use are part of the modern agenda to recycle wastes, and to retain nutrients, pollutants, and heavy metals in the soil and to offset some greenhouse gas emissions. Biochars from wood (eucalyptus sawdust, pine bark), sugarcane bagasse, and substances rich in nutrients (coffee husk, chicken manure) produced at 350, 450 and 750°C were characterized to identify agronomic and ...

2014
Christian Folberth Hong Yang Thomas Gaiser Junguo Liu Xiuying Wang Jimmy Williams Rainer Schulin

Much of Africa is among the world’s regions with lowest yields in staple food crops, and climate change is expected to make it more difficult to catch up in crop production in particular in the long run. Various agronomic measures have been proposed for lifting agricultural production in Africa and to adapt it to climate change. Here, we present a projection of potential climate change impacts ...

2017
Peng Yan Junxiao Pan Wenjie Zhang Junfang Shi Xinping Chen Zhenling Cui

Understanding the physiological changes associated with high grain yield and high N use efficiency (NUE) is important when increasing the plant density and N rate to develop optimal agronomic management. We tested the hypothesis that high plant densities resulting in crowding stress reduce the ability of plants to use the N supply post-silking, thus decreasing the grain yield and NUE. In 2013 a...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1391

abstract global financial crisis has created too many problems in relations among governments. among these problems, the issue of global monetary management, more than every time in the past four decades, has been moved in the center of international economic attentions. a problem which is specially known with the monetary hostility between united states and public republic of china. where ar...

2013
Hagai Yasuor Alon Ben-Gal

Producers of horticultural products face new and growing standards regarding food quality and safety as well as environmental responsibility and sustainability. The objective of this research was to reduce environmental pollution by increasing nitrogen use efficiency (NUE) in vegetables without negatively affecting fruit yield or quality. Bell pepper was used as a case study for intensive veget...

2002
David J. Wittry Antonio P. Mallarino

Land application is the most common method for utilizing manure produced by the livestock industry. Manure applications at rates that exceed crop P removal are increasing soil-test P (STP) in many regions. Precision agriculture methods and variable-rate (VR) application can improve nutrient management and provide an environmentally responsible method to distribute manure. This study used a stri...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2003
G T Champion M J May S Bennett D R Brooks S J Clark R E Daniels L G Firbank A J Haughton C Hawes M S Heard J N Perry Z Randle M J Rossall P Rothery M P Skellern R J Scott G R Squire M R Thomas

The Farm Scale Evaluations of genetically modified herbicide-tolerant crops (GMHT) were conducted in the UK from 2000 to 2002 on beet (sugar and fodder), spring oilseed rape and forage maize. The management of the crops studied is described and compared with current conventional commercial practice. The distribution of field sites adequately represented the areas currently growing these crops, ...

2009
Juan Gao Xinmei Hao Kurt D. Thelen

This study investigated long-term agronomic management systems and precipitation level effects on soybean [Glycine max (L.) Merr.] total oil content and fatty acid composition. Management systems evaluated included conventional (CT), no-till (NT), low chemical input (LI), and zero chemical input (ORG). Total oil content and major fatty acids profi les were analyzed by accelerated solvent extrac...

2014
K. Sridhar V. Rajesh S. Omprakash

1 Department of Agronomy, College of Agriculture, Rajendranagar, Hyderabad, A.P.500030. 2 Department of Genetics and Plant Breeding, College of Agriculture, Rajendranagar, Hyderabad. 3 Department of Entomology, College of Agriculture, Rajendranagar, Hyderabad, A.P.500030. Corresponding author:E mail: [email protected] Mobile: 09948735896 INTRODUCTION India is the second most populous coun...

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