1,720,979 research outputs found
Risposta produttiva dell'olivo (Olea europaea L.) all'irrigazione in ambiente mediterraneo
No full textn.d
Irrigation of intensive olive groves in the Mediterranean environment with different water regimes on two different soils: effects on yields, water use efficiency, vegetative behaviour and water status of the crop
No full textTo cope with the FAO motto 'more food with less water' it will be important to define the irrigation strategy not only according to the variety and type of olive grove but also based on the available soil. A certain number of papers focused on assessing the effects of different water regimes on different cultivars and/or agronomical characteristics of the grove while is very difficult to find studies that try to evaluate those effects of different soils. With the aim to give a contribution in elucidate the role of the soil characteristics on water management, two experimental trials have been carried on during the same two years in olive groves with same cultivar, very similar agronomical characteristics, and climatic conditions but with quite different soils, one shallow and silty and the other deep and silty-loamy. Compared water regimes were a dry control (T0) and two irrigated with restitution of 50% (T50(WR)) and 100% (T100(WR)) of the watering volume required to restore the full crop evapotranspiration. Main results are: (i) shoot growth did not differ among water regimes; (ii) leaf water potential decreased from the T100(WR) to the T0; (iii); T50(WR) and T100(WR) showed a very significant increase of yields, particularly different in terms of drupes (much higher in the deep soil) but much more similar in terms of oil between the two soils; (iv) oil content increase in TWR respect to T0, although somewhat less on the deep soil (22.81% in average for TWR treatments and 17.32% for T0, based on two years); (v) seasonal irrigation volumes were widely different between years (72 and 800% higher in the dry year respect to the rainy year for the shallow and the deep soil, respectively) but not so different between soils in the very dry year (23% higher in the deep soil)
Organo Mineral Fertilizers Increases Vegetative Growth and Yield and Quality Parameters of Pomegranate cv. Wonderful Fruits
Full text linkIn recent years, to improve sustainable production in horticultural crops, many new types of strategies have been developed, including organo-mineral fertilization to complement chemical fertilizers in order to enhance the nutritional status of plants and sustainability of the agroecosystems. This study was performed on a young pomegranate orchard of the "Wonderful" cultivar during the 2018 and 2019 seasons. The purpose was to evaluate the effects of three foliar applications (at the red ball, fruit setting, and fruit development stages) of four commercial organo-mineral fertilizers (Hendophyt((R)), Ergostim XL (R), Siapton((R)) 10L, and Allibio Rad((R))) on vegetative growth, yield, and several other physico-chemical parameters of the fruits, throughout each season. The results obtained showed several differences between the two years. The annual trunk growth of trees under all compared treatments showed significantly lower values in 2018 (average 9.7 mm) than in 2019 (average 11.8 mm). At the end of the two-year period, the biostimulant treatments resulted in significantly larger trunk diameters (average 43.6 mm) than the control (39.6 mm). Only in 2018, significantly higher number of fruits per tree, number of arils per fruit, edible part, and juice yield were obtained under biostimulant treatments compared with the control. No differences among treatments were observed for any color parameters or physico-chemical traits in the fruits for either year. In 2019, fruit morpho-pomological properties tended to be lower than in 2018, while in contrast, total phenol content and antioxidant activity were higher. The warmer and windier weather conditions of 2019 probably led to greater plant stress conditions, with a reduction in fruit size and an increase in the bioactive compounds of juice. In conclusion, due to the various positive results, foliar organo-mineral fertilizers could be recommended to improve the performance of pomegranate Wondeful cv. under similar conditions
Fruit set, yield and carpological characteristics of five almond cultivars (Prunus dulcis (Mill.) D.A. Webb) as affected by different soil management in Southern Italy
No full textAlmond cultivation is of considerable importance among fruit crops of the warm-temperate climate and has been growing steadily worldwide since the early 1990s, reaching about 1.87 million cultivated hectares in 2016. In the Mediterranean Region, where the main parts of almond orchard are located, high erosion rates have been observed in many tree crops, including almond. Tillage is the traditional and prevailing soil management technique in the Mediterranean Basin despite many studies reported negative effects on soil quality highlighting the significant increase of soil erosion determined by this technique. But very few data are available in the literature, especially for almond, about the effects on vegetative and reproductive activities, yields and fruit quality of tree crops. The trial aimed to evaluate the effect of three different soil management techniques (‘conventional tillage’, ‘no-till without cover crop’, ‘frequently mown cover crop’) on five almond cultivars (‘Ferragnés’, ‘Filippo Ceo’, ‘Genco’, ‘Supernova’, ‘Tuono’), grown in a commercial almond orchard located in Southern Italy. Average fruit set, yield tree-1 and dimensional parameters of fruits and kernel were determined. The tested cultivar showed difference in their fruiting behaviour regarding the distribution of both floral buds and fruits on different types of bearing shoots. This suggested, with the aim to increase productivity, that during pruning it is necessary to mainly preserve a different type of shoots in each one of these cultivars. For all the cultivars evaluated, quite negative effects resulted in terms of both yield and carpological parameters for the ‘no tillage’ treatment, while the best performances were observed for the ‘conventional tillage’ treatment
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
Adattamento al cambiamento climatico mediante l’uso di nuovi portinnesti di vite: risposta vegeto-produttiva dell’Aglianico
No full textn.d
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
- …
