Annals of the University of Craiova - Agriculture, Montanology, Cadastre Series
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RESEARCH ON THE OPTIMIZATION OF PLANTWORK AS A LINK IN VEGETABLE GROWING TECHNOLOGY
Get PDFThe continuous increase of vegetable consumption has led to the intensification of research to improve and streamline vegetable cultivation technologies. Achieving an optimal technology involves obtaining the highest possible yields per unit of cultivated area, at a higher quality, under the conditions of using minimal human and financial resources. The paper presents a series of experimental research on technologies for growing vegetables in the field, insisting on the work to be planted, on that depends the evolution of the crop from establishment to harvest. After a short review of the works necessary for the establishment of the culture, there is a system of different types of technical equipment for planting seedlings, some requirements of the planting work, presentation of a type of equipment, among the most efficient currently used, quality indices obtained from the experimentation of the mentioned equipment, conclusions and recommendations
THE INFLUENCE OF MACERATION DURATION ON THE QUALITY OF RED WINES FROM THE MURFATLAR VINEYARD
Get PDFMaceration is the main technological stage in red vinification. The duration of maceration is the main technological factor that influences the intensity of extraction of phenolic compounds and aromas from grapes. In this study we applied different maceration times to the vinification of three red varieties from the Murfatlar vineyard and we found significant differences between wines in terms of composition and sensory properties
ESTIMATION ON THE WEAR AND DURABILITY OF THE HEAD OF THE MILLS USING DIFFERENT MODELS
Get PDFThe mathematical model presented in this paper is one of the possible mathematical models to use to estimate the wear and lifespan of the head of the milling cutter, which has an appreciable age and initially modeled a relatively similar phenomenon of aggression or erosion of an entity by a high. The mathematical model of the prey-predator population system, well known in ecology and expressed in a system of differential equations always of the order of AJ Lotka and V. Volterra is successfully applied in other fields: economics, services, prediction of technological evolution, adoption cryptocurrencies, hygiene, communications (security and optimization), medicine, passenger transport forecast, plasma physics. In this wide context of applications, there are also applications used in the paper, of the prey-predator model, Lotka-Volterra, to the interaction phenomenon between the dental milling cutter and the milled material. The application starts from the assimilation of the dental cutter with the predator that extracts material from the body of the milled material, assimilated with the prey. The milling action, the action of the predator, does not remain without negative results for him, the milling material also losing particles. Both parts of this phenomenon cannot grow as a mass, an experimental aspect that turns into an important hypothesi
RESEARCHES ON THE DEVELOPMENT OF AN EXPERIMENTAL MODEL OF WET SATURATED STEAM DISTILLATION EQUIPMENT
Get PDFDistillation is a conventional method of extracting volatile oils from medicinal and aromatic plants. This is defined as a process of separating the components of a mixture that is based on the difference between the vaporization temperatures of the constituents, respectively water and oil when distilling medicinal plants. Distillation can be performed in three ways: distillation with water, by boiling the mixture of plants and water, condensation of resulting vapours and separation of oil, distillation with water and steam, in which the steam obtained by evaporating a quantity of water passes through the plant batch; steam distillation under pressure provided by an external generator, a process named in the literature and steam entrainment. The steam distillation process is applicable to many medicinal and aromatic plants that grow in our country. The extraction of volatile oils through this process depends on the different characteristics of the plants but also on the main parameters of the process, pressure and temperature, which are different
RESEARCH ON MYCOFLORA PRESENT ON SOYBEAN SEEDS (GLYCINE MAX L.)
Get PDFThe aim of this research was to identify the associated mycoflora and to determine their incidence on soybean seeds. Untreated seeds of the varieties Onix, Sigalia and Procera 1020 have been examined. The detected mycoflora has been represented by fungi from the genera: Aspergillus spp., Rhizopus spp., Alternaria spp., Stemphylium spp., Fusarium spp. The pathogen Aspergillus spp. had the highest incidence, of 44%, in the Procera 1020 variety, followed by the Alternaria spp. and Stemphylium spp. complex, with a 33% incidence, in the Onix variety. An attack of Fusarium spp. has been detected in the Onix variety
STUDY ON THE CARTOGRAPHY AND ECOPEDOCLIMATIC CONDITIONS OF CARASU VALLEY
Get PDFThis paper presents the medieval and contemporary cartographic study and the ecopedoclimatic conditions of the Carasu Valley, located in southern Dobrogea, between the Danube and Black Sea. The Carasu Valley delimits the northern plateaus from the southern ones, of Constanta County. Is the only valley that crosses the Medgidia Plateau almost entirely On the both sides of the Carasu Valley is sprending a single vineyard, the Murfatlar vineyard with its wine centers. Also, the paper presents the ecopedoclimatic conditions of this area, conditions that influence the cultivation of vines. Here are the richest heliothermal resources (up to 3,5), with beneficial effects on the grapes maturation, and the presence of the Black Sea makes the sum of effective brightness hours of the sunshine to be the longest in the country, but the volume of precipitation is low
CONTRIBUTIONS TO THE KNOWLEDGE OF THE EPIGEE COLEOPTEROPHUNA FROM APPLE TREE ORCHARDS WITH GRASSED BANDS BETWEEN ROWS SOWED WITH GUIDES (LOTUS CORNICULATUS)
Get PDFIn preparing this work, the material collected with the help of the soil traps type BARBER, of the "wet" type, was used in an apple tree orchards in the Deleşti area, Vaslui county. The traps operated from May to September inclusive.The material from the traps was harvested periodically, throughout the vegetation period, depending on the pedoclimatic conditions, generally at intervals of 10-12 days.At each of the 10 collections of the material, the liquid in the trap was replaced. The material was then determined, identifying the species of beetles.The most frequently collected and the most numerous species are presented below: Harpalus calceatus (75 specimens), Harpalus pubescens (49 specimens), Anysodactilus binotatus (48 specimens), Harpalus tenebrosus (43 specimens)
THE SPEED INFLUENCE WORKING ON SOWED ACCURACY AND PRECISION SEEDING
Get PDFCurrent studies and research on sowing methods and equipment are part of the new trends for the practice of precision agriculture. Among the operating parameters of precision seeders, sowing uniformity is essential to obtain high yields 50% of the crop being determined at work sowing (according to the literature). Any disturbance of the sowing process leads to the decrease of the qualitative indices of the sowing work and finally to the decrease of the production [3]. Thus, the main direction for improving the sowing machines is their constructive improvement (including the control and measuring equipment of the sowing precision) [5]. Regarding the sowing precision, we refer to the distance between the nests and the sowing depth
RESEARCH ON THE LEAF AREA THROUGH THE PRISM OF HYBRID X DENSITIES X MOMENT OF DETERMINATION INTERACTION TO AN ASSORTMENT OF THE SUNFLOWER TESTED ON THE CHERNOZEM FROM CARACAL
Get PDFAt ARDS Caracal, on chernozem type soil, for two years (2018 and 2019), 9 sunflower hybrids were tested to study the interaction between hybrid, sowing density and moment of leaf area determination. The hybrids were: Euromis, Generalis, Terramis, Neoma, Diamantis, Subaro, Performer, FD15C27, FD116M1. The densities of which hybrids were: 43000 pl / ha, 57000 pl / ha and 71000 pl / ha and the moment of determining the leaf area was placed 32 days, 43 days, 54 days and 66 days after emergence. The leaf area was determined on all the leaves on the plant, on 3 plants on each replication, using Schneiter's (1978) formula: S = (L * l * 0.6683) -2.45 where S = leaf area, L = length of the leaf, l = width of the leaf. Compared to the first determination, in the other three, the leaf area showed very significant increases in all densities and all hybrids. At medium and high densities, only Neoma and FD15C27 hybrids had fast leaf surface growths. The leaf area was lush at low density in Neoma and FD116M1 hybrids while Euromis and Performer hybrids showed the same leaf area in both densities: low and medium
THE CURRENT STATE OF THE VITIVINICULTURE SECTOR IN ROMANIA
Get PDFAfter Romania accessed the European Union in 2007 and especially after 2009, there were major changes in Romania in the viticulture and winemaking field regarding the alignment of the legal framework to the Common Agricultural Policy (P.A.C.). During the post-accession, there were both important quality leaps in this field and a series of difficulties imposing a synthetic analysis in order to identify certain solutions to diversify the vineyard range and to improve the quality of the winemaking products.In this framework, concerning the strategies and policies implemented in the vitiviniculture sector in Romania during the last decade, this study refers to the following aspects: assessing the reconversion-restructuring stage of the vineyards in Romania, assessing the stage of implementing national strategies to produce high-quality wine (with PDO and PGI), as important premises for providing quality and specificity to the wine products