1,720,967 research outputs found
Oliveti Secolari: aspetti economici, sociali e biodiversità, per lo sviluppo del territorio
No full textHow agro-ecological services crops affect soil arthropod diversity in Mediterranean organic greenhouse production
No full textConventionalization of organic agriculture through input substitution, aimed to fulfill certification requirements, without improvement of natural ecological cycles in agroecosystem, is a relevant concern especially for the organic greenhouse (OGH) sector. Following a holistic approach, more resilient agroecosystems may be designed by taking advantage of Agro-ecological Services Crops (ASC) cultivation during the crops sequence and by using organic matter amendments for the soil fertility management. In this framework, we investigated ecological sustainability of three OGH production systems by studying the soil arthropods taxa. Following systems were under assessment: i) SUBST - bare soil priori to cash crop + organic fertilizer; ii) AGROCOM - ASC as green manure priori to cash crop + compost; and iii) AGROMAN ASC as dead mulch + animal manure. Monitoring of soil arthropods was performed by using pitfall traps and divided in two phases: the pre-crop period (during cultivation of ASC or bare soil in SUBST) and cash crop (kohlrabi) production. Collembola was the most abundant group during cultivation of ASC, in all tested systems and their activity density (AD) was higher in SUBST compared to other two systems. Isopoda, Araneae and Staphylinidae were significantly more abundant in AGROMAN, where manure was applied before ASC sowing. During kohlrabi cultivation Collembola group was confirmed as the most represented in all systems, with the highest values in AGROMAN. Moreover, significant differences were found among the systems for Opiliones, Myriapoda and Staphylinidae groups; with the highest abundance of all these taxa in the AGROCOM system. Results obtained indicate that an agro-ecological practices (ASC cultivation, compost and manure application) could contribute to ecological sustainability and the development of organic agriculture under protected environment
Comparison of Maturity Indices for Composting Different Organic Waste
No full textAmong several methods used to assess maturity of compost, determination
of diethyl ether and choloroform extractable lipids seems to be a promising technique
as lipids are an important portion of all organic wastes. The aim of this paper was
to monitor maturity parameters of compost piles made from different organic sources
(cow manure, poultry slaughterhouse, and dairy industry) using different methods. Diethyl
ether (DEE) and chloroform (CHCl3) extractable lipids have been measured during
composting and compared to other parameters commonly utilized to study compost stability
and maturity (organic carbon, total and inorganic N, CO2 evolution rate, microbial
biomass C, and phytotoxicity test). Results suggested none of these parameters may
exhaustively describe maturity of composts studied
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Organic vs. organic - soil arthropods as bioindicators of ecological sustainability in greenhouse system experiment under Mediterranean conditions
Full text linkOrganic greenhouse (OGH) production is characterized by different systems and agricultural practices with diverse environmental impact. Soil arthropods are widely used as bioindicators of ecological sustainability in open field studies, while there is a lack of research on organic production for protected systems. This study assessed the soil arthropod abundance and diversity over a 2-year crop rotation in three systems of OGH production in the Mediterranean. The systems under assessment differed in soil fertility management: SUBST - a simplified system of organic production, based on an input substitution approach (use of guano and organic liquid fertilizers), AGROCOM - soil fertility mainly based on compost application and agroecological services crops (ASC) cultivation (tailored use of cover crops) as part of crop rotation, and AGROMAN - animal manure and ASC cultivation as part of crop rotation. Monitoring of soil fauna was performed by using pitfall traps and seven taxa were considered: Carabidae, Staphylinidae, Araneae, Opiliones, Isopoda, Myriapoda, and Collembola. Results demonstrated high potential of ASC cultivation as a technique for beneficial soil arthropod conservation in OGH conditions. SUBST system was dominated by Collembola in all crops, while AGROMAN and AGROCOM had more balanced relative abundance of Isopoda, Staphylinidae, and Aranea. Opiliones and Myriapoda were more affected by season, while Carabidae were poorly represented in the whole monitoring period. Despite the fact that all three production systems are in accordance with the European Union regulation on organic farming, findings of this study displayed significant differences among them and confirmed the suitability of soil arthropods as bioindicators in protected systems of organic farming
Organic strawberry in Mediterranean greenhouse: Effect of different production systems on soil fertility and fruit quality
No full textFirst data of vascular flora and floristic biodiversity on ancient olive groves in Apulia
No full textA survey on the vascular flora growing in very old olive groves in apulia region was carried out within the framework of the liFE+ "CEnt. oli. MEd. (liFE 07 nat/it/000450)" project. a number of 341 taxa are listed, some of which are considered important for their endemic, amphiadriatic and phytogeographic interest. some of them are also included under intErnational ConVEntions (Cites and berne), regional or italian red list of plants and under directive 92/43/EEC (annex ii). these data analysed in light of other information and some biodiversity indexes will be used to develop guidelines for biodiversity in situ conservation and valorization
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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