Search results for "Farms"
showing 10 items of 37 documents
Effect of resource availability on evolution of virulence and competition in an environmentally transmitted pathogen
2018
Understanding ecological and epidemiological factors driving pathogen evolution in contemporary time scales is a major challenge in modern health management. Pathogens that replicate outside the hosts are subject to selection imposed by ambient environmental conditions. Increased nutrient levels could increase pathogen virulence by pre-adapting for efficient use of resources upon contact to a nutrient rich host or by favouring transmission of fast-growing virulent strains. We measured changes in virulence and competition in Flavobacterium columnare, a bacterial pathogen of freshwater fish, under high and low nutrient levels. To test competition between strains in genotype mixtures, we devel…
The Potential Role of Direct and Indirect Contacts on Infection Spread in Dairy Farm Networks.
2017
Animals’ exchanges are considered the most effective route of between-farm infectious disease transmission. However, despite being often overlooked, the infection spread due to contaminated equipment, vehicles, or personnel proved to be important for several livestock epidemics. This study investigated the role of indirect contacts in a potential infection spread in the dairy farm network of the Province of Parma (Northern Italy). We built between-farm contact networks using data on cattle exchange (direct contacts), and on-farm visits by veterinarians (indirect contacts). We compared the features of the contact structures by using measures on static and temporal networks. We assessed the d…
Bariery rozwoju rodzinnych gospodarstw rolnych w opinii ich właścicieli z województwa opolskiego = Barriers to the development of family farms in the…
2018
Celem opracowania jest identyfikacja zmian w zachowaniach organizacyjnych i produkcyjnych właścicieli towarowych gospodarstw rolnych służących zapewnieniu trwałości gospodarstw oraz poznanie głównych barier, których przezwyciężenie jest istotne dla budowania potencjałów rozwojowych rolnictwa i obszarów wiejskich w województwie opolskim. W badaniach uwzględniono czynniki egzogeniczne i endogeniczne, w szczególności: politykę rolną, wielowarstwowe otoczenie instytucjonalne, gotowość rolników do inwestowania, zmiany w technologii produkcji, poszukiwanie nisz specjalizacyjnych. Źródłem informacji były badania ankietowe przeprowadzone wśród właścicieli gospodarstw, produkujących głównie na rynek…
The Green Deal and the CAP: policy implications to adapt farming practices and to preserve the EU's natural resources
2020
The June 2018 CAP proposals are only marginally consistent with the ambitions of the Green Deal. This is also the case of the regulation revisions being adopted by either the Council or the European Parliament in October 2020. Making EU agriculture consistent with the Green Deal but would require a whole food chain policy that encompasses more stringent instruments on the supply side and extensive changes in eating patterns.
STRATEGY TO INCREASE THE FARM COMPETITIVENESS
2014
Italy’s wine-growing production structure is highly pulverized. So, for many wine-growing farms loweri ng the production cost represents the only way of gain ing a competitive advantage. Production at average unit costs lower than competitors allows to improve prof itability. Among farming operations, winter pruning and tying of productive vine-branches require a high hu man labor. For this reason the paper presents the r esults of research conducted on a sample of Sicilian wine- producing farms in order to study the cost-effectiv eness to make the pruning and the subsequent ligation of productive branches with tools that facilitate the work. The economic analysis, after the determination o…
Les modes d'habitat à l'âge du Bronze en France
2018
The many discoveries made in preventive archaeology have drawn the picture of a highly anthropogenic landscape in Bronze Age France. Timber post buildings are the most common type of dwellings however other types of construction (sills, mudbrick, …) that have lighter foundations and are more susceptible to erosion are considered less common due to the inherent problems of identification. Small dwellings from 25 to 40 m2 with a quadrangular 1 to 3 aisled plan and built to house a nuclear family are the most common,. Other types of buildings differ from this standardised plan such as the long rectangular dwellings in Alsace dating to the Early Bronze Age (type Eching) or the Early Bronze Age …
La matriz de análisis de políticas con datos eficientes: evaluación de la rentabilidad del cultivo del arroz
2008
This paper combines policy analysis matrix and data envelopment analysis techniques to model the analysis of profitability from farming. Policy analysis matrices are computed for a sample of rice growers located in the wetland of the Albufera (Eastern Spain) under observed conventional and profit-efficient farming conditions. While conventional analysis points to a lack of profitability, farmers are shown to make positive profits at private and social prices when data reflecting efficiency adjustments are used in the analysis. The main conclusion is that the usefulness of the policy analysis matrix might be substantially enhanced by simulating profitability after efficiency-improving manage…
Design issues for wind farms grid tied Inverter
2017
In this paper the Authors give indications for the design of a grid tied Voltage Source Inverters (VSI) aimed to optimal use in energy conversion from wind source. In particular, the design of the inverter is more focused on the control system planning, with a particular glance on the grid synchronization problem. After the exposition of general issues concerning renewable energies and associated topics, the case of a grid tied inverter is considered and a methodology of design is sketched starting from the consideration of the DC side and also considering the power device losses, the protection issue against over voltages and over-currents, snubber circuits, heat sinks and, finally the con…
Runoff initiation, soil detachment and connectivity are enhanced as a consequence of vineyards plantations.
2017
[EN] Rainfall-induced soil erosion is a major threat, especially in agricultural soils. In the Mediterranean belt, vineyards are affected by high soil loss rates, leading to land degradation. Plantation of new vines is carried out after deep ploughing, use of heavy machinery, wheel traffic, and trampling. Those works result in soil physical properties changes and contribute to enhanced runoff rates and increased soil erosion rates. The objective of this paper is to assess the impact of the plantation of vineyards on soil hydrological and erosional response under low frequency - high magnitude rainfall events, the ones that under the Mediterranean climatic conditions trigger extreme soil ero…
Indoor and outdoor determination of pesticides in air by ion mobility spectrometry.
2016
Abstract The use of ion mobility spectrometry (IMS) has been evaluated as analytical methodology to detect and evaluate the occupational exposure to pesticides. The developed IMS methodology was used, in positive and negative modes, to determine the presence of pesticides in air and to evaluate possible inhalation exposures of workers and users based on active sampling on Teflon membranes and direct thermal desorption IMS. The negative IMS mode was used to determine bensulfuron, clorpyrifos, diniconazole, diuron, flutolanil and imidacloprid, while the positive mode was employed to evaluate formetanate, metalaxyl, metamitrone, metribuzin, paclobutrazol and pirimicarb. The IMS measurements pr…