1,720,965 research outputs found
Influence of Fruit-Zone Leaf Removal and Nitrogen Nutrition on Yield Quality and Methoxypyrazines of Sauvignon blanc wine grape: a case of study in North-East Italy
Full text linkLe prove agronomiche di nutrizione azotata e defogliatura hanno dimostrato
un’influenza sulla sintesi di metossipirazine e sulla qualità delle uve di Sauvignon blanc. La nutrizione azotata
allunga la crescita vegetativa, lo sviluppo della chioma e probabilmente la biosintesi di pirazine. La
defogliatura in prechiusura grappolo non altera la qualità ma deprime la sintesi di pirazine all’invaiatura.
L’effetto annata è sempre determinante sui risultati alla vendemmi
"La Viarte" project: The knowledge of whole surface variability within a precision viticulture approach
No full textThe knowledge of spatial variability is particularly important and several studies were carried out around the world, since it has been speculated that the overall grape quality is negatively affected by the vineyard heterogeneity. Based on this, a project was carried out in "LA VIARTE" (one important winery in the Friuli Colli Orientali D.O.C, area) with the aim to examine the spatial variability of the whole viticultural surface in order to make thereafter decisions about possible applications of variable-rate technologies or selected harvest. During 2009 and 2010 several soil parameters (texture, moisture, organic matter, etc.), NDVI, stem water potential, yield and grape quality parameters were collected in more than 100 plots well distributed in the different vineyards in several timings along the season. Data were coupled with GPS position and processed into maps that were overlaid in order to distinguish the overall variability of the vineyards. Correlations among yield, quality parameters and vigour were then evaluated for each cultivar, and based on vigour, selected areas were divided within the vineyards to ascertain the grape performance. In 2010 wines were made from 'Friulano', 'Sauvignon', 'Schioppettino' and 'Pignolo' vineyards keeping separated the opposite vigour areas, and they were tasted by an expert panel. The results of the sensory coupled with the chemical analysis of wines highlighted the possibility to separate grapes in order to obtain basic and premium wines within the same vineyard. The decision between keeping or reducing the intra-vineyard variability throughout the application of VRT, will be a decision of LA VIARTE owners, based on the requests of the future wine market
Nutrizione azotata della vite: risultati preliminari dell’applicazione di fertilizzanti organici
No full textThe calibration of the sprayers and the factors involved in coverage uniformity in the vineyard
Full text linkThe phytopathological condition of the vineyard and the reduction in the use of crop protection products are closely linked to the efficiency of the use of sprayers. The objective of the work was to identify the best operative conditions to improve the canopy coverage of the spraying. From 2012 to 2017 173 field trials were carried out in 40 farms, on 24 varieties, testing 72 different sprayers in North Eastern Italy. Water-sensitive papers of 2.5 × 2.5 cm were positioned in eight points in the vine canopy according to a standardized method, and they were examined after spraying for spray deposition. In general, results showed that coverage of the lower leaf surface was very poor. On the contrary, the upper section of leaves in the outer canopy layers have received excessive spraying, over 70% coverage in 25% of cases. The coverage uniformity was improved by using driving speeds lower than 6 km / h and using upward air flow direction
Long-term effects of Trichoderma asperellum and Trichoderma gamsii on the prevention of esca in different vineyards of Northeastern Italy
No full text
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
Effects of leaf removal on aromatic precursor dynamics during maturation of Ribolla Gialla grapes (Vitis vinifera L.)
Full text linkLeaf removal is a viticultural practice applied in order to improve fruit-zone microclimate and berry quality. The aim of this trial was to evaluate the effect of post-flowering leaf removal on maturation and biosynthesis of terpenes and and C13-norisoprenoids in Ribolla Gialla grapes. In the seasons 2015 and 2016, basic maturation parameters were nearly unaffected by leaf removal. Contrarily, in the second season, 2016, one week before harvest, the concentration of several aroma compounds was significantly improved by leaf removal. In conclusion, the trial here showed that leaf removal improves the concentration of aroma compounds in the grapes, but the selection of the date of harvest is more crucial in order to maintain them during vinification
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
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