نتایج جستجو برای: agricultural spatial development

تعداد نتایج: 1814181  

2017
Lina Peng Yan Hu Jiyun Li Qingyun Du

Socioeconomic factors are extrinsic factors that drive spatial variability. They play an important role in land resource systems and sometimes are more important than that of the natural setting. The study aims to build a comprehensive framework for assessing unconsolidated cultivated land (UCL) in the south-central and southwestern portions of Hubei Province, China, which have not experienced ...

2004
Wang Younian Gao Fei

The agricultural information, as an important productive force, has permeated the whole course of the agricultural production. The agricultural information plays an important role in the development of our agricultural in the 21, and supports the agricultural modernization. This paper explicates that the agricultural information has effect on the agricultural development, studies the meaning of...

2011
S. Zandi

Abstract: Soil pH has a major effect on plant nutrient availability by controlling the chemical structure of the nutrient. Adjusting soil acidity or alkalinity improves soil nutrition without adding extra fertilizers. Soil nutrients needed by plants in the largest amount are referred to as macronutrients. In addition to macronutrients, plants also need trace nutrients and both macro and trace n...

2004
Eric Koomen Jan Groen

Although the Netherlands is one of the most densely populated countries, two thirds of the land area are still under agricultural use. Major socio-economic changes are however expected for the agricultural sector. The increasing globalisation of economic relations in agriculture and the possible reduction of European price support to farmers are examples of such developments that may affect agr...

2009
Jaepil Cho Saied Mostaghimi

* Corresponding author. USDA – ARS, SEWRL E-mail addresses: [email protected] (J. Cho), sm 1537-5110/$ – see front matter Published by doi:10.1016/j.biosystemseng.2009.01.011 Non-point source simulation models are commonly used tools for examining water and water quality issues. The dynamic agricultural non-point source assessment tool (DANSAT) is the distributed-parameter, physically-based, and cont...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
آصف کریمی دانشجوی دکتری دانشکدۀ اقتصاد و توسعۀ کشاورزی دانشگاه تهران ایرج ملک محمدی استاد دانشکدۀ اقتصاد و توسعۀ کشاورزی دانشگاه تهران محمود احمدپور داریانی استادیار دانشکدۀ کارآفرینی دانشگاه تهران احمد رضوانفر استاد دانشکدۀ اقتصاد و توسعۀ کشاورزی دانشگاه تهران

the purpose of this study was to investigate the influence of entrepreneurship on organizational outcomes agricultural extension in the context of agricultural sustainable development. this paper aimed to identify the key dimensions of entrepreneurship and determine how these dimensions influence the outcomes of agricultural extension organizations in the context of agricultural sustainable dev...

2008
Stefan Dercon

Poverty is still a predominantly rural phenomenon. However, the context of rural poverty has been changing across the world, with high growth in some economies and stagnation in others. Furthermore, increased openness in many economies has affected the specific role of agricultural growth for rural poverty reduction. This paper revisits an ‘old’ question: how does growth and poverty reduction c...

2010
Thembi Russell James Steele

We report on the compilation of a new geo-referenced database of Early Iron Age dates for the regions associated with the expansion of Bantu-language speaking peoples in sub-Saharan Africa. We explore the database as a source of coarse-grained evidence of ecological constraints on site location, and as a source of evidence for large-scale spatial trends in dates for first arrival and subsequent...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
مرتضی تهامی پور زرندی دانشجوی دکتری دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران حبیب الله سلامی استاد دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران سعید یزدانی استاد دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران امیرحسین چیذری استادیار اقتصاد کشاورزی، دانشکدۀ اقتصاد و توسعۀ کشاورزی، دانشگاه تهران

the purpose of this study is to determine spatial dependency pattern of systematic risk of dry land wheat production in iran, using spatial autoregressive models. to this end, spatial weighted contiguity matrix was constructed based on the delaunay triangularization method, and correlation coefficient among these neighbors were estimated using spatial autoregressive models. in addition, the rol...

The present study deals with agricultural development in rural areas as a phenomenon related to urban growth. This study believes in this hypothesis that urban growth per say would motivate agricultural activities in surrounding rural areas .It aims to investigate the level of agricultural development resulted from rural-urban mutual relationships and interactions. The study area is composed...

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