Annals of the University of Craiova - Agriculture, Montanology, Cadastre Series
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THE QUALITY OF THE AQUATIC ENVIRONMENT IN FISH PONDS
Get PDFIn our country, the most widespread growth system is the semi-intensive one with growth units represented by ponds (anthropogenic ecosystems). The semi-intensive fish culture is based on the natural productivity and / or enriched by fertilization of the anthropogenic ecosystems, respectively also on the administration of supplementary food. In fact, semi-intensive cultivation involves obtaining a fish biomass with low production costs due to the use of inexpensive inputs. The productionprofile and the way of obtaining it determine the structure and duration oftheexploitation cycle within a fish farm
PRICE OF GRAIN MAIZE AT THE LEVEL OF THE EUROPEAN UNION (2016-2018)
Get PDFThe paper highlights the evolution of the price of grain corn for members of the European Union. The analysed time interval is 2016-2018, emphasizing the short-term price evolution. The price is presented and analysed in the context of the specific conditions of cultivation, for the 28 component states of the European Union, starting from the differences related to climatic factors, the degree of development, capitalization and subsidization of agricultural production. The trading price registered a national multiannual average of 175.22 /t for Croatia (2016) and 251.50 /t)
STUDIES ABOUT THE USE OF TECHNICAL METHODS IN ORDER TO IMPROVE THE WORKING PROCESS OF PLOW BODY
Get PDFIn this paperwork the authors present the technical improvements nationally and internationally on the construction of the plow bodies which are equipping the general use ploughs for the work execution of the plowing work.The study started from the main operating parameters of the general use plow bodies, respectively the degree of overturning and crushing of the furrow as well as the degree of the ground leveling. Therewith it is refering to the resistance of the haulage and to the reduction of the fuel consumtion regarding the elimination of the harrowing work with the execution of the plowing work. Plow bodies made by several both national and international manufactures were taken into this study
BENEFITS REGARDING THE IMPLEMENTATION OF AGRICULTURE 4.0 IN THE CURRENT CONTEXT
Get PDFAgriculture 4.0 is comprised of different already operational or developing technologies such as robotics, nanotechnology, synthetic protein, cellular agriculture, gene editing technology, artificial intelligence, blockchain, and machine learning, which may have pervasive effects on future agriculture and food systems and major transformative potential. This paper presents some considerations regarding the technologies used in agriculture 4.0, namely: cheaper and more accurate sensors and microprocessors, cloud and IoT improvement and the use of radio units for data transmission and analysis and processing of large volumes of data
CONSIDERATIONS REGARDING THE USE OF EQUIPMENT FOR THE ESTABLISHMENT OF WATER COLLECTION BASINS FROM PRECIPITATION AND FROM THE USE OF SPRAY IRRIGATION SYSTEMS
Get PDFGlobal warming has been growing rapidly lately, which implies an increasing need for water for the good development of agricultural crops. To allow the recovery of a significant amount of water from rainfall or irrigation, reducing the amount of energy necessary for irrigation but also for soil losses caused by the phenomenon of erosion or puddling, works are introduced in crop technologies with the help of which this recovery can be achieved. This paper presents equipment used for the execution of rainwater catchment basins and the use of sprinkler irrigation systems
ANALYSIS OF THE PROFITABILITY RATIOS OF ROMANIAN COMPANIES LISTED ON BUCHAREST STOCK EXCHANGE: TRENDS AND PERSPECTIVES
Get PDFThe actuality of the issue of the evaluation of corporate profitability acquires an increased relevance in the light of the economic context that describes this beginning of the 21st century, strongly marked by the globalization of the economic systems, by the intensification of the level of competition and by the increasing occurrence of the This study analyses the evolution of profitability of Romanian companies listed on Bucharest Stock Exchange in a period that was both characterised by economic growth, but also marked by the global pandemic, i.e. 2016-2020. Thus, the analysis comprises 35 companies listed on BSE, representing eight sectors of the Romanian economy, of the total 10 existing in the national capital market, i.e. Mining and quarrying, Manufacturing, Electricity, gas, steam and air conditioning supply, Constructions, Wholesale and retail trade, Transportation, Storage, Professional, scientific and technical activities. Therefore, half of the sectors to which the analysed companies belong to have not seen a dramatic profitability decrease in the timeframe under analysis. On the other hand, a visible drop took place in 2018 in the sectors of Electricity, gas, steam and air conditioning supply, Professional, scientific and technical activities and Constructions. By contrast to the first two sectors, in the constructions sector, profitability ratios are evolving increasingly negative over the next two years of study. Besides, the transportation represents the sector that has consistently registered relevant levels for all profitability ratios, providing the most favourable evolution
STUDY REGARDING THE NECESSARY TOPOGRAPHIC WORKS DRAWING ON THE FIELD OF THE MAIN TOPOGRAPHIC ELEMENTS OF AGRITOURISTIC CONSTRUCTION
Get PDFThe paper presents a modern method of field application of an agrotourism reception structure using a high-performance topographic equipment of the latest generation, with the help of which a series of completely new procedures and tracing operations could be applied on the field. The construction will be located in the beautiful and dynamic agrotourism area Bulzeşti - Măldăreşti, in the South-West Oltenia development region, an area that has a rich and valuable natural and anthropic tourist potential, which has not been capitalized on its true value, due to the lack of main of the tourist reception structures. The aim of the paper was to prepare in the best conditions the technical documentation necessary primarily for the design of the construction, but at the same time it can be used further in the next phases of its drawing and actual execution. From the presented, it was found that the work performed fully complies with the precision requirements and legal regulations imposed on such a work, and tracing as the main method of field application of the main elements of a construction could be performed according to the requirements of precision, detail and accuracy by the designer and the beneficiary
THE EFFECT OF THE INTERACTION OF FERTILIZATION WITH MACROELEMENTS ON THE PRODUCTION OF TEMPORARY GRASSLANDS ESTABLISHED IN ARABLE LAND
No full textIn the complex of measures for the establishment, maintenance and use of temporary (seeded) grassland, fertilization is a major factor in achieving large, good quality, constant and for as long as possible. For the ecopedological conditions at S.C.D.A. Şimnic- Craiova, in the fertilization of temporary non-irrigated meadows can be used practically with the same efficiency, ammonium nitrate, urea and especially nitrocalcare. The administration of nitrogen at the level of the dose of N120 divided by crops, shows very significant increases in yield. On the P70 agrofounder, ammonium nitrate, nitrocalcar and urea achieved increased biomass productions between 7,3-8,3 t / ha d.s
PERFORMANCE ANALYSIS FOR AN EXPERIMENTAL DIESEL ENGINE FUELED BY A MIXTURE OF RAPESSEED OIL AND DIESEL
Get PDFDue to the current international situation in terms of rising energy prices, biodiesel remains an extremely attractive fuel in terms of alternative fuels for agriculture sector. The advantages of using biodiesel by diesel engines can be explained both by the fact that it is produced from renewable sources with lower costs than conventional fuels and by the fact that biodiesel is comparable in terms of performance with conventional fuels. Besides the fact that it is obtained from green sources studies have shown that biodiesel has a number of advantages in terms of pollutant emissions. In this paper we will analyze the performances obtained by an experimental single-cylinder engine model AVL 5402
GEOTECHNICAL DOCUMENTATION FOR THE CONSTRUCTION OF A GREENHOUSE IN THE LIMITROPHE AREA OF CRAIOVA
Get PDFThe geotechnical documentation constitutes the quality verification at the requirement of resistance and stability of the foundation lands and earth masses and includes technical information about the land location and morphological data, classification in the geotechnical category, investigation of the foundation land, lithology and physical-mechanical characteristics of the land and the foundation conditions, obtained by performing a geotechnical drilling and dynamic penetration tests and the analysis of stratification, granulometry and physical-mechanical characteristics. The ground is flat and good foundation on 0.0-6.0 m depth, the conventional pressure is 170 kPa for Df = 0.8 m and B = 0.6 m and respectively 264 kPa for Df = 4.0 m and B = 2.0 m being recommended insulated foundations or insulated foundations with balancing beams, the terrain presents a low geotechnical risk and a degree of seismicity 82