نتایج جستجو برای: agricultural structure

تعداد نتایج: 1663136  

2016
Chen Jin Kai Huang Yajuan Yu Yue Zhang Arjen Y. Hoekstra

Beijing suffers from a severe water shortage. To find the key factors that impact the agricultural water footprint (WF) within Beijing to relieve the pressure on water resources, this study quantifies the agricultural WF within Beijing from 1980 to 2012 and examines the factors of population, urbanization level, GDP per capita, Engel coefficient, and total rural power using an extended stochast...

2002
Michael Kremer Alix Peterson Zwane Gavin McGillivray Ranajit Bandyopadhyay Nicholas Hayden

Agricultural needs in poor, tropical countries differ significantly from those in temperate, rich countries. Yet little agricultural research is performed on products for the tropics. Private sector research is particularly concentrated in rich countries. This is a result of significant failures in the market for R&D, in particular, the difficulty of preventing the resale of seed in developing ...

Journal: :JSW 2012
Lijuan Huang Jie Yu Xingwang Huang

Governments in many countries are applying themselves to improve life of peasants, and planning and building agricultural logistics distribution center is key content of New Countryside Construction in china nowadays. This paper uses theories and methods of Interpretative Structure Model (ISM) to discuss and analyze on agricultural logistics distribution center location. The first is to select ...

2013
Chiara Marchi Liselotte Wesley Andersen Volker Loeschcke

Several arthropods are known to be highly beneficial to agricultural production. Consequently it is of great relevance to study the importance of land management and land composition for the conservation of beneficial aphid-predator arthropod species in agricultural areas. Therefore our study focusing on the beneficial arthropod Bembidion lampros had two main purposes: I) identifying the physic...

2007
Huanguang Qiu Jun Yang Jikun Huang Ruijian Chen

This study aims to examine the impact of the China–ASEAN Free Trade Area (CAFTA) on China’s international agricultural trade and its regional agricultural development, using the Global Trade Analysis Project model and the China Agricultural Decision Support System. Our analysis showed that: (i) CAFTA will improve resource allocation efficiencies for both China and ASEAN and will promote bilater...

2013
Fuensanta García-Orenes Alicia Morugán-Coronado Raul Zornoza Artemi Cerdà Kate Scow

Agricultural practices have proven to be unsuitable in many cases, causing considerable reductions in soil quality. Land management practices can provide solutions to this problem and contribute to get a sustainable agriculture model. The main objective of this work was to assess the effect of different agricultural management practices on soil microbial community structure (evaluated as abunda...

Journal: :Frontiers in Earth Science 2021

Converting forest and wetland landscapes to agriculture has shown result in a loss of organic matter, structure, microbial diversity the converted soil but recovery post-agricultural soils remains poorly understood. Here we coupled landscape-scale surveys 1) carbon nitrogen levels, 2) aggregation, 3) bacterial metagenomes investigate after 30 years sites with ranging from well drained drained. ...

2009
Juzhong Zhuang

Capitalizing on the most recent worldwide estimates of the impacts of climate change on agricultural production, this paper assesses the economic effects of climate change for Southeast Asian countries through 2080. The results suggest that the aggregate impacts of agricultural damages caused by climate change on the global economy are moderate. However, the uneven distribution of productivity ...

2017
Min Su Rui Jiang Rongrong Li

Developing low-carbon agriculture requires investigating the trajectory, decoupling statuses, and driving forces of agricultural carbon emissions. This study explored the evolution of agricultural carbon emissions based on 18 kinds of major carbon emission sources in Henan Province of China, which produces approximately one-tenth of China’s total grain output. We then analyzed the relationship ...

Journal: :Journal of nematology 1998
D L Porazinska R McSorley L W Duncan J H Graham T A Wheaton L R Parsons

Interest in the sustainability of farming practices has increased in response to environmental problems associated with conventional agricultural management often adopted for the production of herbaceous crops, ornamentals, and fruit crops. Availability of measures of the status of the soil ecosystem is of immediate importance, particularly for environmental assessment and monitoring programs. ...

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