نتایج جستجو برای: agricultural systems
تعداد نتایج: 1272109 فیلتر نتایج به سال:
Background: Conventional cattle ranching and agricultural practices have severely degraded and fragmented tropical forests in Latin America. This trend has resulted in the loss of a range of ecosystem services upon which humans depend, especially those that support agricultural production, such as biodiversity, the provision of water and soil fertility. Consequently, conventional cattle ranchin...
In recent years, there have been major advances in the development of new and more powerful perception systems for agriculture, such as computer-vision and global positioning systems. Due to these advances, the automation of agricultural tasks has received an important stimulus, especially in the area of selective weed control where high precision is essential for the proper use of resources an...
This paper reviews about the importance of various expert systems used in agricultural domain. Present expert systems plays the role of agricultural engineer and provide users the different methods of diagnosis and treatments. In agriculture, expert systems unite the accumulated expertise of individual disciplines, e.g., plant pathology, entomology, horticulture and agricultural meteorology, in...
Contents 1. Introduction – biodiversity in agricultural ecosystems 2. Planned diversity and the functioning of agricultural systems 2.1. Intraspecific diversity 2.2. Species diversity 2.3. Habitat and landscape diversity 3. Unplanned diversity and the functioning of agricultural systems. 3.1. Pollination services 3.2. Soil processes 3.3. Natural pest control 4. Conclusions Bibliography Biograph...
Lack of sewage collection systems, percolation of surface waters, and seepage of wells have raised the groundwater table in Shiraz area in the south of Iran. The growing population generates environmental pollution resulting in the degradation of the quality of surface and groundwaters used for agriculture. Inorganic and organic pollutants have been traced in Shiraz water resources. Heavy metal...
Climate change might impact crop yields considerably and anticipated transformations of agricultural systems are needed in the coming decades to sustain affordable food provision. However, decision-making on transformational shifts in agricultural systems is plagued by uncertainties concerning the nature and geography of climate change, its impacts, and adequate responses. Locking agricultural ...
Agricultural investment and financing systems in USA, France and Japan have their own features and advantages. Through comparison of agricultural investment and financing systems in foreign advanced countries, this article is going to put forward some enlightenments for reform of agricultural investment and financing system in China.
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