نتایج جستجو برای: vertical farms
تعداد نتایج: 116813 فیلتر نتایج به سال:
Infectious salmon anaemia (ISA) is an important infectious disease in Atlantic salmon farming causing recurrent epidemic outbreaks worldwide. The focus of this paper is on tracing the spread of ISA among Norwegian salmon farms. To trace transmission pathways for the ISA virus (ISAV), we use phylogenetic relationships between virus isolates in combination with space-time data on disease occurren...
During the past few decades, vertical farming has attracted a lot of interest as an alternative food production method. Vertical farms use engineered growth environments and hydroponic cultivation techniques for growing plants indoors. One important factors in different is amount nutrients, which can be measured electrical conductivity (EC). Studying optimal EC avoiding nutrient loss deficiency...
Efficiency analysis is used for assessing links between technical efficiency (TE) of livestock farms and animal diseases. However, previous studies often do not make the link with the allocation of inputs and mainly present average effects that ignore the often huge differences among farms. In this paper, we studied the relationship between exposure to gastrointestinal (GI) nematode infections,...
The prevalence, distribution, and antimicrobial susceptibility of methicillin-resistant Staphylococcus aureus (MRSA) in Belgian pig farms has been investigated. To that end, nasal samples were collected from 1,500 pigs on 50 farms randomly selected over Belgium. Both closed (breeding or farrow-to-finish) and open (fattening) farms were included. Within closed farms different age groups were inv...
آبشستگی تکیه گاه پایه پل به علت انقباض مقطع جریان و افزایش موضعی سرعت جریان در اطراف تکیه گاه پل و شکلگیری گردابه های جریان رخ میدهد. با توجه به اینکه مقطع عرضی رودخانه ها عموماً مرکب می باشند و تکیه گاه پلها ممکن است در قسمت سیلاب دشت واقع شود، بنابراین اندرکنش جریان اصلی با جریان در سیلاب دشت در حضور تکیه گاه پل الگوی پیچیده ای ایجاد می کند. بنابراین شبیه سازی عددی الگوی جریان و رسوب می تواند ...
The aim of this research is to characterise the wild rabbit (Oryctolagus cuniculus) commercial game farms in Spain using variables related to structure, management and marketing. To this end, a structured survey was administered in 2009 to 21 privately-owned farms. This subsector was an average age of 13. The average size of the breeding stock of the farms was 431 does and 64 bucks. Eighty-five...
The purpose of this research was socioeconomicanalysis of farms using primary data in two villages of Mymensingh Sadar. A total of 60 farms including 20 small, 20 medium and 20 large were randomly selected for the study. Socioeconomic analysis showed that indebtedness was higher in large farms than those of small and medium ones. Large farms also engaged more in farm activities than others. All...
The damaged environment is a global problem. It is more serious in China because of the cultivable land destroyed. So the agroecosystem reconstruction is the primary object in China. A case of reclamation planning in LiaoNing Province was studied in this paper. A large number of abandoned land sites have become an urgent task for the local government since farmland is so short in this area. The...
Intensification and specialisation of agriculture in developed countries enabled productivity to be improved but had detrimental impacts on the environment and threatened the economic viability of a huge number of farms. The combination of livestock and crops, which was very common in the past, is assumed to be a viable alternative to specialised livestock or cropping systems. Mixed crop-livest...
WEST, Inc. (2006) reported on the first year of fatality monitoring in the Diablo Winds Energy Project, which replaced 169 vertical axis wind turbines with 31 larger horizontal axis wind turbines in the Altamont Pass Wind Resource Area (APWRA). WEST, Inc. also compared bird utilization and mortality in the project area to utilization and mortality reported by Smallwood and Thelander (2004) acro...
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