Search results for "S1-972"
showing 10 items of 124 documents
Analysing longitudinal turbulence intensity in vegetated channels
2007
Vegetation altering hydrodynamic conditions of an open channel flow controls the exchanges of sediment, nutrients and contaminants. In this paper the turbulence structure of open-channel flow over a flexible grass vegetation is investigated. Velocity measurements were carried out, in a rectangular flume, using a 2D-ADV (Acoustic Doppler Velocimeter) for different values of stem concentration, water discharge, and bed slope. The experimental results showed that: 1) the maximum value of the longitudinal turbulence intensity occurs at a water depth close to the bent vegetation height; 2) the turbulence intensity damps for increasing values of the stem concentration; 3) above the vegetation hei…
Cover crops and pruning in Bobal and Tempranillo vineyards have little influence on grapevine nutrition
2016
ABSTRACT Cover crops may improve vineyard soil properties, grapevine nutrient status and berry composition, however, factors such as cover crop type, annual rainfall, climate and irrigation may change their effects on vineyards. From 2008 to 2011, the effects of a non-permanent cover crop and two pruning techniques on soil as well as vine nutrients and grapevine performance of two vineyards (cv. Tempranillo and cv. Bobal) were evaluated. For that purpose, two legumes were sown in inter-rows of hand-pruned vines in February and were tilled at flowering. Soil tillage, or cover cropping, was combined with either light pruning or severe pruning to study foliar nutrient variations. Soil N, P, K …
Heat Recovery Systems for Agricultural Vehicles: Utilization Ways and Their Efficiency
2018
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COMPARISON BETWEEN TWO TYPES OF WINEMAKING TANKS FOR THE PRODUCTION OF QUALITY WINES CV. NERO D’AVOLA
2012
The aim of this work is to compare two types of winemaking tanks, horizontal and vertical, using Nero d’Avola grapes, in order to assess the capacity of extraction of phenolic compounds that determine the quality of red wines. The study shows that in wine made by horizontal winemaking tanks, both anthocyanins and polyphenols have a higher decrease in time compared to wine made by the vertical type. The higher values of polyphenols found in the horizontal type appear to show that wines produced by this type of winemaking tank have a better quality in terms of health for antimicrobial, antioxidant and antiinflammatory properties of these molecules.
Analysis of the main factors influencing the quality of wine from mechanically harvested grapes
2009
The wine sector is going today through a period of severe crisis mainly due to the process of globalization in which all the countries producing wine have entered into fierce competition with each other. As a consequence, the achievement of the product on the market exclusively depends on a good value for money. One of the main factors that affect the cost of running the vineyard and, therefore, the final price of the wine is certainly the grape harvest. For the reasons given above this technique, used to be performed manually, is today impossible to support except that there would be the use of the harvesting machine. It’s well known that the use of the harvesting machine has the limit of …
Analysis of the filtration efficiency of white wines using different filter aids
2010
The global wine market, having recently entered into full crisis, is suffering some changes in its production and marketing. The reasons for these changes are mainly due to new trends in consumer demand for wine safety and quality standards at low cost. Social cellars, in order to be included in this new trend, should focus on the rationalization of the production techniques to reduce the costs and improve the quality of wine. In the case of winemaking for the production of a wine stored in a bag-in-box, filtration is a very important technique because it gives the finished product clearness and stability. The experimentation was based on the application of a low cost filtration technique o…
Source shape and data analysis procedure effects on hydraulic conductivity of a sandy-loam soil determined by ponding infiltration runs
2017
Performing ponding infiltration runs with non-circular sources could represent a good means to sample completely an area of interest. Regardless of the shape of the source, predicting the expected reliability of the collected data by infiltrometers should facilitate soil hydraulic characterisation and also allow a more conscious use of the field data. The influence of the shape of the infiltration source (i.e., circular or square) and the analysis procedure of the steady-state infiltration data on the saturated hydraulic conductivity, Ks, of a sandy-loam soil was tested in this investigation. Circular and square surfaces sampled with the pressure infiltrometer (PI) yielded similar estimates…
DIVERSITY AND THE MAIN ECOLOGICAL REQUIREMENTS OF THE EPIGEIC SPECIES OF FOREST ECOSYSTEMS IN THE SIBIU COUNTY, IN THE YEARS 2013-2014
2014
Epigeous insects in the “Dumbrava Sibiului” oak forest were captured between 2013-2014. From April to September in each year. 12 traps were installed in a circle 147 individuals collected belonged to 28 species and 6 families: Carabidae – 14 species (50.0%), 187 individuals (77.37 %), Staphylinidae – 7 species (25.0 %), 15 individuals (6.17 %), Silphidae – 3 species (10.72 %), 29 individuals (11.93 %), Elateridae – 1 species (3.51 %), 1 individual (0.41 % ), Scarabaeidae – 2 species (7.14 %), 8 individuals (3.29 %), Forficulidae – 1 species (3.51 %), 2 individuals (0.82 %)). Also, we presented in tables the ecological requirements of the species of Carabidae collected, the variation of thei…
A Territorial-driven approach to capture the transformative momentum of the Social Economy especially from the agricultural cooperatives
2021
In the last few lustrums, the literature has searched for more precise methods to assess the socio-economic importance of the Social and Solidarity Economy (SSE). On that basis, this article offers a new way of assessing the SSE impact, enhancing the understanding of the SSE potential for socio-economic transformation. An evolutionary micro–meso–macro and territorial theoretical framework is developed, utilizing, along with the assistance of a qualitative methodology, studies on the transformation promoted by the SSE on the sugar cane cluster of Veracruz (Mexico). The main results of the article are that the SSE boost beneficiaries, while the protagonists of the transformation c…
SUSTAINABLE MANAGEMENT PERMANENT GRASSLANDS
2014
The Natural complete ecosystem, the original form of development of human society has changed due to the adoption of diversified development options, mainly oriented towards production systems designed to erode the harmony between man and nature. As a consequence of these changes, we are witnessing today an increase of the probability of manifestation of nuisance factors, namely harmful and the vulnerability of human society to their action. The global reaction to this situation, though delayed, is notable and oriented towards the adoption of specific actions intended to produce change towards a environmentally friendly economy. This change, called sustainable development, is a topical issu…