1,720,991 research outputs found
Effect of organic fertilization treatments on grasspea (Latyrus sativus L.)
No full textA better knowledge of important relationships between soil and crop production is necessary to develop sustainable agricultural systems. It is often stated that only a few staple crops produce the majority of the food supply. This might be correct but the important contribution of many minor species should not be underestimated.
Legumes have always been used as a source of nutrient-rich organic matter and nitrogen for crops. The grass pea (Lathyrus sativus L.) is a food, feed and fodder crop belonging to the family Leguminosae . This crop has over the past decade received increased interest due to its adaptability to arid conditions and contains high levels of protein, a component that is increasingly becoming hard to acquire in many developing areas.
In Italy, after a drastic decline in the last 50 years, there is great potential for an expansion in the utilization of grass pea in the sustainable crop systems of the marginal areas of southern Italy. The diffusion of grass pea cropping is subject to the evaluation of the potential grain yield in the semi arid areas of south Italy.
The objectives of this study were to investigate the impact of different organic fertilization treatments on quantity and quality traits of grain and the effects of crop-residue application on yields in a grass pea-durum wheat rotation system. The results show that the grass pea has not been able to take advantage from high fertilizer input. Good yield performance was obtained from cultivar Gecon 15 in the studied crop rotation system
Evaluation of nitrogen efficiency indexes in cereals crop production in Mediterranean agro-ecosystems
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Agronomic evaluation and quality characterization of lentil accessions (Lens culinaris L.) in a Mediterranean environment
No full textAgronomic evaluation and quality characterization of lentil accessions (Lens culinaris L.) in a Mediterranean environmentLentil (Lens culinaris Medik.) is an important grain legume cultivated in the Mediterranean region and used for human nutrition. An extensive differentiation of lentil over millennia has permitted the evolution of many landraces. These ecotypes often are the result of centuries of selective choices by local farmers and are characterized by high genetic variability and high adaptation to different environmental conditions. Presently, lentil is mainly cultivated in marginal areas of Central and Southern Italy and in Sicily small cultivation has permitted the evolution of local landraces. An understanding of the genetic relationships and diversity of lentil germoplasm, in relation to landraces collected in traditional cultivation areas of Sicily and from other countries, is important in attempting to widen the genetic resource in the region. 30 accessions of lentil obtained from FAO collection and 10 local ecotypes were evaluated for agro-morphological-qualitative traits in internal hilly environment of Sicily. A wide range of diversity of almost all of detected traits was recorded for the lentil accessions. Some accessions were characterized by a good adaptation to the semi-arid environment of internal environment of Sicily as shown by the comparison of its yield performance with that of populations native to Sicily or to other countries. The study of agronomic important traits, as plant height, showed less variability, even though some accessions could be used to adapt the crop to modern production techniques such as mechanical harvesting . The evaluation of this collection has shown an appreciable results that could foster future breeding programmes
Comparative study of genotype-environment interaction of oat and triticale varieties in southern Italy
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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
Valutazione e caratterizzazione bio-agronomica e qualitativa di popolazioni di avena (Avena sativa L.) di origine siciliana.
No full textTra i cereali minori l’avena ((Avena sativa L.) costituisce una importante risorsa agronomica e economica per gli areali mediterranei. Infatti, questa specie è caratterizzata da una maggiore rusticità rispetto a cereali maggiori come il grano duro, che le permettono di ben adattarsi ad ambienti di coltivazione collinari marginali delle aree meridionali.
L’ampia gamma di destinazione produttiva della specie sia per l’alimentazione umana (granella) che animale (foraggio-granella, pascolo-fieno, pascolo-insilato) la rendono una specie assai interessante per le aziende cerealicolo-zootecniche. Inoltre, tale specie, ha già promosso una interessante attività sia nel settore agro-alimentare e sia nel settore della industria cosmetico-farmaceutica grazie principalmente agli effetti salutistici delle fibre solubili, in particolare i beta-glucani, altamente contenuti nella sua fibra. Da alcuni anni l’interesse per l’avena è andato crescendo grazie anche all’introduzione sul mercato di nuove varietà che hanno permesso la diffusione di questa specie in aree poco utilizzate e la possibilità di trovare un mercato più ampio, con nuovi impieghi per questa coltura. Tuttavia oggi, il ricorso alle nuove varietà, peraltro costituite per rispondere alle esigenze produttive di aree assai diverse, ha fatto si che un importante patrimonio genetico costituito da popolazioni locali sia a forte rischio di erosione genetica.
Il recupero e valorizzazione di germoplasma locale risulta strategico in vista non solo della conservazione della biodiversità della specie ma anche per l’individuazione di genotipi con caratteristiche produttive interessanti per una loro introduzione nelle aree marginali meridionali. Pertanto, si è ritenuto opportuno avviare un’attività di ricerca volta a collezionare popolazioni locali siciliane di avena, nelle zone di coltivazione tipiche per questa specie, e a valutarne il comportamento bio-agronomico e qualitativo ponendole a confronto con alcune varietà oggi più diffuse in coltura.
La ricerca è stata effettuata nel biennio 2005/2009 presso l’Azienda Sperimentale Sparacia sita nel territorio del comune di Cammarata in provincia di Agrigento (37° 37’N – 13° 42’E).
Sono state messe a confronto 26 popolazioni locali di avena, raccolte nella Sicilia centro-occidentale, con 6 varietà iscritte al Registro Nazionale. Lo schema sperimentale adottato è stato quello del blocco randomizzato con tre repliche sono stati rilevati i seguenti parametri: produttività, caratteri morfo-fisiologici della pianta e delle cariossidi, e caratteri merceologici e qualitativi della granellaOat (Avena sativa L.), among minor grain, is an important resource for Mediterranean areas, both economic and agronomic implications. In fact, this species is more hardy than the major cereals like wheat, which allow it to grow in marginal environments typical of internal areas of South of Italy.
Oat is an important crop for integrated crop-livestock farming systems, widely used as animal feed (feed-grain, hay-pasture, pasture-silage) as well as for human consumption (grain). In addition, this species is highly recognized for its positive health benefits, attributed in part to soluble fiber (especially beta-glucans).
For several years, interest in oats has been increasing by the introduction of new varieties that have allowed the spread of this species in under-used agricultural areas and the possibility to introduce different oat grain products in the market for human consumption. Actually the active oat breeding programs around the world have selected new oat varieties, developed for different growing areas. Given the danger of genetic erosion the collection and enhancement of local oat germplasm is a strategic point for biodiversity conservation of the species and plant breeding. Therefore, the objectives of this study was to collect local oats populations in traditional growing areas of Sicily, and to compare their bio-agronomic and quality behavior with most common commercial varieties.
A total of 26 local populations, collected in internal central-western Sicilian environments, were studied under field conditions in Cammarata (Agrigento- Southern Italy) over three growing seasons (2005-2006, 2006-2007 and 2007-2008). compared to 6 varieties listed on the Italian National Register of Varieties (Hamel, Primula, Argentina, Donata , Bionda and TeoBD41). Field experiments were carried out in a randomized block design with three replications. The sowing rates were 400 seeds m-2 for experiment conditions. and the following parameters were counted: yield (t/ha), protein and lipid content of grain (%), high of plant (cm). Data were analyzed using SAS, version 9.2
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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