نتایج جستجو برای: agricultural field

تعداد نتایج: 876417  

Journal: :Journal of the Illuminating Engineering Institute of Japan 1985

Journal: :Agronomy 2021

Engineered nanoparticles (ENPs) have potential application in precision farming and sustainable agriculture. Studies shown that ENPs enhance the efficiency of delivery agrochemicals thus, to positively affect environment, thereby improving growth health crops. However, majority research on effects plants agricultural applications been limited controlled laboratory conditions. These conditions d...

2014
Richard Shumway Henry Tizard C. R. SHUMWAY

89 Agricultural production economics research is examined within a broad framework of scientific development and utilization. Recent findings in selected areas of the subdiscipline are examined and opportunities for further fruitful inquiry are identified. A few 'stylized facts' emerge from recent work and suggest the need for much careful hypothesis testing, model exploration, and empirical se...

Ismaeili Aval, Mohammad, Karami Dehkordi, Ismail, Mahboobi, Mohammad Reza, Shahbazi, Ismail,

Background and Aim: This study aimed to identify and Analyzing the structural and outward features and expected activities of a service-extension agricultural website, based on the views of experts in the field of agriculture and related sciences and webmasters and blogs in Iran. Method: The methodological approach was a descriptive and survey study. The statistical population of the study cons...

Journal: :Environmental Modelling and Software 2007
Heikki Lehtonen Ilona Bärlund Sirkka Tattari Mikael Hilden

In this study the impacts of different agricultural policies on agricultural production and nutrient leaching from agricultural lands are evaluated using the economic DREMFIA agricultural sector model and a field scale nutrient transport model ICECREAM. DREMFIA includes an evolutionary scheme of technology diffusion which considers farm investments, evolving farm size structure and technologica...

2014
Tola Gemechu Ango Kristoffer Hylander

Farmers’ practices in the management of agricultural landscapes influence biodiversity with implications for livelihoods, ecosystem service provision, and biodiversity conservation. In this study, we examined how smallholding farmers in an agricultureforest mosaic landscape in southwestern Ethiopia manage trees and forests with regard to a few selected ecosystem services and disservices that th...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
غلامرضا دین پناه استادیار گروه ترویج و آموزش کشاورزی،واحد ساری، دانشگاه آزاد اسلامی، ساری، ایران فرهاد لشگرآرا استادیار گروه ترویج و آموزش کشاورزی، دانشگاه آزاد اسلامی،واحد علوم و تحقیقات، تهران، ایران محمد مهاجری کارشناس ارشد سازمان جهاد کشاورزی استان گیلان، ایران

elements of agricultural knowledge and information management(research, extension, farmers, ngo and …) to near together in appropriate process were used in farmer field school approach. the purpose of this study was to determine the effect of farmer field school (ffs) approach on agricultural knowledge and information management. the research population consisted of 420 farmers who participated...

Ahmed M. Abdel Rahman Mohamed E. Hamid

Climate change represents the major challenge to Sudan agricultural production, economics and food security. Changes in temperature, rainfalls, water availability, increased outbreak of pest and diseases, land degradation, soil erosion, shrinking of grazing and cultivate areas, ongoing desertification and the other aspects of climate change have direct significant impact on agricultural product...

Journal: :The Science of the total environment 2014
Mark Marvin-DiPasquale Lisamarie Windham-Myers Jennifer L Agee Evangelos Kakouros Le H Kieu Jacob A Fleck Charles N Alpers Craig A Stricker

As part of a larger study of mercury (Hg) biogeochemistry and bioaccumulation in agricultural (rice growing) and non-agricultural wetlands in California's Central Valley, USA, seasonal and spatial controls on methylmercury (MeHg) production were examined in surface sediment. Three types of shallowly-flooded agricultural wetlands (white rice, wild rice, and fallow fields) and two types of manage...

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