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Valutazione bio-agronomica di varietà di olivo da mensa in Sardegna
No full textLa valorizzazione della filiera dell’olivo da mensa presuppone,
tra le altre cose, l’impiego di cultivar perfettamente
adattate all’ambiente di coltivazione. Nel panorama nazionale
modelli produttivi fondati su varietà plastiche dalla
grande adattabilità (internazionali e nazionali) si confrontano
con processi di valorizzazione del germoplasma locale.
In questa nota si riassumono i risultati di studi condotti in
due diversi ambienti della Sardegna per confrontare il
materiale genetico locale di maggiore interesse e diffusione
in coltura (Nera di Gonnos e Tonda di Cagliari) con varietà
di rilevanza internazionale (Gordal) e nazionale (Carolea,
Nocellara del Belice, Nocellara Etnea, Sant’Agostino e
Santa Caterina).
La prima esperienza si è svolta in un impianto commerciale
ubicato nel nord Sardegna (Chilivani, Ozieri), di 15 anni
d’età, allevato a vaso libero con una distanza di piantagione
di m 6x3 e irrigato a goccia. Negli ultimi quattro anni si
sono valutate 5 cv registrando alta vigoria vegetativa per
Nera di Gonnos, Gordal e Tonda di Cagliari, mentre accrescimenti
minori per diametro del fusto e altezza della chioma
si sono osservati per le due varietà siciliane Nocellara
del Belice ed Etnea. La Gordal, mediamente produttiva, ha
fornito frutti di grande dimensione, ricchi di zuccheri riduttori
e poveri di lipidi, mentre la più elevata produttività si è
osservata per la Nera di Gonnos e la Nocellara del Belice.
La seconda esperienza, condotta nella Sardegna centrooccidentale
(Oristano) in una parcella di 15 anni allevata in
irriguo a vaso policonico con sesto di m 6x6, ha ribadito la
vigoria e produttività della Nera di Gonnos e l’elevata pezzatura
dei frutti nelle cv locali Confetto e Sivigliana da
mensa, comunque con valori inferiori a quelli di S.
Caterina e S. Agostino. Le cv a frutto grosso ed elevata
resa in polpa hanno mostrato elevata sensibilità alla mosca
delle olive, carattere presente però anche in alcune cv a
frutto piccolo. Il controllo della mosca è stato condotto nel
rispetto del Regolamento regionale per (2014)
Performance di cultivar internazionali e locali in nuove aree di coltivazione dell’olivo da mensa in Sardegna
No full textLa filiera nazionale dell’olivo da mensa utilizza sia cultivar specializzate con drupe di sicuro valore merceologico -nazionali e internazionali- sia varietà locali “a duplice attitudine” ben adattate ai tradizionali ambienti di coltivazione e, nella loro eterogeneità, potenziale base per un prodotto di elevata tipicità. La Sardegna, quarto produttore italiano del settore, ha conservato sino agli Anni Ottanta del secolo scorso l’ordinamento spaziale e il patrimonio varietale affermatosi nel secolo XIX. La Riforma Agraria avviata negli Anni Sessanta ha avviato il cambiamento con un modello “toscano” che ha fornito deludenti risultati, mentre successive misure di sostegno hanno sia contaminato il germoplasma locale con varietà calabresi e siciliane sia diffuso modelli di olivicoltura intensiva in aree del tutto nuove per la coltura. La caratterizzazione agrometeorologica dei due ambienti a confronto -settentrionale l’area di espansione, meridionale quella di antica coltivazione- evidenzia un accumulo annuo di temperature utili (su base 0°C, per la normale climatologica) superiore del 44% nel sito meridionale, con rese più elevate delle due cv locali “Nera di Gonnos” e “Tonda di Cagliari”. Lo studio ribadisce l’opportunità di indagini preliminari sulla vocazionalità ambientale dei siti di nuova introduzione, in funzione delle diversificate esigenze varietali.Table olive national market is based on both national and international specialized cultivars and on well adapted local
“double attitude” (oil and table production) varieties that usually guarantee a high typical qualitative production due to their
heterogeneity. This study is aimed at valuating the possibility of spreading and comparing local, national and international
table olive cultivars in internal areas of Sardinia. These areas are potentially suitable for cultivars with high chilling unit
requirements and highly susceptible to olive moth attacks. The areas of cultivation present different agrometeorological
characteristics: in the southern traditional area, average annual GDD are 44% higher than in the north new area, while
Chilling Units accumulation is about 39% lower. The Sardinian cultivars Nera di Gonnos and Tonda di Cagliari present
good adaptability in the northern area of cultivation, and a higher resistance to olive moth compared to national and
international cultivars. The study confirms how preliminary investigation on land suitability to new potential areas of
cultivation and new solutions in fighting olive moth attacks in relation to cultivar characteristics are necessar
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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