نتایج جستجو برای: farm structure
تعداد نتایج: 1603283 فیلتر نتایج به سال:
OBJECTIVE The main objective of this study was to systematically review the existing evidence for the effectiveness of farm injury prevention interventions. SEARCH STRATEGY We used a systematic approach to search the following electronic databases: MEDLINE, EMBASE, ERIC, PsycInfo, Sociofile, NTIS, Agricola, Expanded Academic Index, Dissertation Abstracts, and Occupational Safety and Health (N...
abstract accurate water measurement and delivery are basic issues in irrigation networks management and performance. in this regard, baffle modules have been considered as appropriate means for delivering almost constant discharge within a specific range of upstream water variation. the structure is meant for low discharge delivery and could be employed in farm irrigation. however, the design c...
A one-year prospective survey was conducted to study the incidence of and potential risk factors for farm-related injuries in Eastern Ontario. One hundred and seventeen dairy and beef farms were surveyed using a personal interview. Information was collected on demographic characteristics of the farm owners, workers, and families; characteristics of the farm operations; and information on behavi...
This study analysed factors influencing food security status of female headed farm households in Abia state, Nigeria. Multistage random sampling technique was employed in selecting 240 female headed farm households from whom data were collected using structured questionnaire. Data collected were analyzed using descriptive statistics, food security indices and probit regression technique. Result...
The study examined interest of farmers and insurance companies in farm insurance. The sample consisted of 110 respondents; 100 farmers and 10 insurance companies. The Probit model was used to analyse the effect of factors affecting the willingness of cocoa farmers to accept farm insurance. All of the respondents had ever heard of one or more types of insurance whiles 32% had knowledge of farm i...
OBJECTIVES Exposure to environments rich in microorganisms such as farms has been shown to protect against the development of childhood asthma and allergies. However, it remains unclear where, and how, farm and other rural children are exposed to microbes. Furthermore, the composition of the microbial flora is poorly characterised. We tested the hypothesis that farm children are exposed indoors...
A multi-group semi-stochastic model is formulated to describe Salmonella dynamics on a pig herd within the UK and assess whether farm structure has any effect on the dynamics. The models include both direct transmission and indirect (via free-living infectious units in the environment and airborne infection). The basic reproduction number R0 is also investigated. The models estimate approximate...
In a previous report (RRR 16-2006) the Hungarian structure of the use of arable land has been analyzed. This paper is devoted to application of a similar approach to farms. The main difference is that somewhat surprisingly the underlying mathematics, i.e. the stochastic programming model, is more complicated in the case of farm level than that one on the national level. Crop rotation determines...
This paper addresses the adequacy and perspectives of multi-agent system (MAS) models in the context of policy support for agricultural policy makers. The paper starts illustrating what MAS are and how they may be used. The general presentation is followed by the description of an exemplary spatial dynamic model of a large number of interacting farms (agents). This model is simulated for differ...
A challenge for the efficient operation of power systems and wind farms is the occurrence of wind power ramps, which are sudden large changes in the power output from a wind farm. This paper considers the probabilistic forecasting of a ramp event, defined as exceedance beyond a specified threshold. We directly model the exceedance probability using autoregressive logit models fitted to the chan...
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