1,720,979 research outputs found
Yield and fruit quality of strawberry cultivars grown in organic farming in the mid-Adriatic area
No full textOrganic fruit and vegetable productions in Marche Region, the main Italian Region of the mid-Adriatic area, are still rising. The interest for the production of organic strawberries is also increasing and brings about the need to identify strawberry cultivars with higher adaptability to open field and protected organic cultivation in this area. With this aim, thanks to a collaboration started between D3A-UNIVPM and the Regional Extension Service Agency (ASSAM), a two years experimental trial was set, comparing sixteen cultivars of strawberries; thirteen of these cultivars were short day cultivars ('Alba', 'Aprica', 'Asia', 'Brilla', 'Clery', 'Cristina', 'Garda', 'Joly', 'Madeleine', 'Premy', 'Romina', 'Sibilla', and 'Syria'), while three were day neutral ('Albion', 'Malga' and 'Monterey'). Among these cultivars, only four were already recommended for strawberry integrated crop production in the Marche Region, while all the other were identified from different national and international programs. The experimental trial, set in 2014, was prepared following a randomized design with three blocks of sixteen plots, of twenty plants each, for both cultivation conditions (open field and protected-Veronese tunnel). At harvest time, data on plant and fruit susceptibility to fungal and pest diseases were detected and vegetative (vigor of the plant, number of crowns), productive (total plant production, total discard for rot and deformed fruit and fruit average weight) and quality (texture, color, content sugars and titratable acidity) parameters were measured. The results showed a significant difference in adaptability, yield and satisfactory quality of some cultivars. Of greatest interest resulted 'Romina', 'Sibilla' and 'Cristina', as short day, and 'Monterey' as day neutral. The 'Veronese tunnel' resulted as a flexible and easy way to manage protected cultivation system that helped to increase yields of different cultivars, highlighting how this technique is essential for the success of strawberry organic production in this area
Study on adaptability of blueberry cultivars in center south Europe
No full textThe European countries have significantly different climates, growing conditions and consumer requirements for berry fruit. The increased demand of blueberry fruit and the consequent cultivation areas is limited by the reduced adaptability of cultivars to different soils and climates. The present study describes the field evaluation of nineteen Vaccinium genotypes (cultivars and selections). The combination of genotypes includes commercial varieties (cultivars) and new breeding lines (selections) released by the New Zealand Institute for Plant & Food Research Ltd. breeding program. For all the genotypes data were collected for two years (2012 and 2013) and included: total plant yield, fruit size, soluble solid content, titratable acidity and phytochemical compounds. Results from this study have demonstrated that none of the genotypes had the best of all traits, however, some adapted to the growing conditions and climat
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
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Evaluation of Vitamin C content in fruit and leaves of different strawberry genotypes
No full textVitamin C plays a critical role in the nutritional evaluation of strawberry fruit, considering that it is one of the main natural sources of this essential micronutrient. Most of the studies are done on fruit but still the variation of leaf Vitamin C content and the correlation with the fruit content is not well known. With the aim of studying this relationship, the Vitamin C content of leaf and fruit of four different strawberry cultivars (Fragaria × ananassa) were measured. The effect of daily changes was also studied by comparing leaf and fruit sampled in the morning and in the afternoon of the same picking days. The sampling was repeated in three days corresponding with the three main pickings of each cultivar. Vitamin C content was analyzed through HPLC-UV analysis. The results confirmed a variation in fruit and leaf Vitamin C content depending to the cultivars. The time of sampling in the day also influenced leaf and fruit content. The correlation studies evidenced almost an independent accumulation trend of this compound in the two plant organs. The results can be used for a better comprehension of the role of genotype and climatic conditions on the physiological pathway of production and accumulation of Vitamin C in strawberry leaves and fruits
Increasing strawberry fruit sensorial and nutritional quality by using wild and cultivated germplasm
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