Bungescu Sorin

Plant Protection and Animal Health, Biosystems Engineering, Animal Science

1.33

Publications

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    ABSTRACT: The most important component of conservation technological systems, as in the case of conventional ones, is soil tillage – loosening and processing – and the introduction of seed into the soil. Conservative systems are based on the less intense loosening of soil, made by different methods, without furrow return and only while maintaining a given amount of crop residues on soil surface, is being considered for this reason as environmental protection strategies. In this paper are presented conservative tillage technologies use in our country and in the world. 1. INTRODUCTION Soil tillage were an integrated part of agriculture from the beginning and served several important purposes: seedbed preparation, reducing soil compaction to increase aeration and better development of the root system of plants, reducing the weed growth, fertilizer incorporation and amendments, crop residues management [1]. Soil conservation concept covers a range of activities, measures and technologies that contribute to the maintenance of soil fertility without significant decrease in crops or without high costs. This system covers a wide range of agricultural methods aimed at keeping the crop residues on the surface of arable land to reduce erosion. Soil conservation technologies are characterized by the fact that leaves on the soil surface more than 30% of crop residues of the previous crop. During plant development, crop residues protects the soil from sun and wind, reducing water loss by evaporation and increases soil moisture in winter by retaining snow on the ground surface [2]. Soil conservation technologies, which leaves a large amount of crop residues on the soil surface, reduce erosion rate by 95% (no-till) compared with conventional soil tilling systems. Crop residues that are uniformly distributed on the soil surface and in greater quantity on slopes where erosion is greater, by intercepting raindrops, absorb their energy and reduce the detachment of soil particles (the first step in the erosion process), slow water flow on sloping soil surface and reduce soil particles transport (the second step in the erosion process) [3].
    4th International Conference on Thermal Equipment, Renewable Energy and Rural Development, TE-RE-RD 2015, Posada-Vidraru (Argeş), Romania; 06/2015
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    [Show abstract] [Hide abstract]
    ABSTRACT: The most important component of conservation technological systems, as in the case of conventional ones, is soil tillage – loosening and processing – and the introduction of seed into the soil. Conservative systems are based on the less intense loosening of soil, made by different methods, without furrow return and only while maintaining a given amount of crop residues on soil surface, is being considered for this reason as environmental protection strategies. In this paper are presented conservative tillage technologies use in our country and in the world. 1. INTRODUCTION Soil tillage were an integrated part of agriculture from the beginning and served several important purposes: seedbed preparation, reducing soil compaction to increase aeration and better development of the root system of plants, reducing the weed growth, fertilizer incorporation and amendments, crop residues management [1]. Soil conservation concept covers a range of activities, measures and technologies that contribute to the maintenance of soil fertility without significant decrease in crops or without high costs. This system covers a wide range of agricultural methods aimed at keeping the crop residues on the surface of arable land to reduce erosion. Soil conservation technologies are characterized by the fact that leaves on the soil surface more than 30% of crop residues of the previous crop. During plant development, crop residues protects the soil from sun and wind, reducing water loss by evaporation and increases soil moisture in winter by retaining snow on the ground surface [2]. Soil conservation technologies, which leaves a large amount of crop residues on the soil surface, reduce erosion rate by 95% (no-till) compared with conventional soil tilling systems. Crop residues that are uniformly distributed on the soil surface and in greater quantity on slopes where erosion is greater, by intercepting raindrops, absorb their energy and reduce the detachment of soil particles (the first step in the erosion process), slow water flow on sloping soil surface and reduce soil particles transport (the second step in the erosion process) [3].
    4th International Conference on Thermal Equipment, Renewable Energy and Rural Development, TE-RE-RD 2015, Posada-Vidraru (Argeş), Romania; 06/2015
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    ABSTRACT: Within the spraying process, the compact jet of solution which comes out from a limited space, represented by the nozzle's body or sprayer, is transformed in a jet of droplets, through liquid dispersion in space, under a certain angle, at a speed capable to surpass the liquid's forces of internal cohesion. The spraying angle of the jet is the cone's angle formed between the tangents to the jet's contour, concurrent in the nozzle's orifice. The spraying angle, as also the jet penetration, illustrates the liquid's distribution on the surface to spray. This angle depends in a great measure of the nozzle type and its orifice size. The pressure of the liquid has a significant effect on the size of the spraying angle. Within the paper is presented a mathematic model which characterizes the angle of the nozzle's jet for spraying machines in field crops in function of the working process parameters. This model is then experimentally validated through on stand tests which simulate the real working conditions.
    Actual Tasks on Agricultural Engineering, Opatija -Croatia; 02/2015
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    ABSTRACT: Within the spraying process, the compact jet of solution which comes out from a limited space, represented by the nozzle's body or sprayer, is transformed in a jet of droplets, through liquid dispersion in space, under a certain angle, at a speed capable to surpass the liquid's forces of internal cohesion. The spraying angle of the jet is the cone's angle formed between the tangents to the jet's contour, concurrent in the nozzle's orifice. The spraying angle, as also the jet penetration, illustrates the liquid's distribution on the surface to spray. This angle depends in a great measure of the nozzle type and its orifice size. The pressure of the liquid has a significant effect on the size of the spraying angle. Within the paper is presented a mathematic model which characterizes the angle of the nozzle's jet for spraying machines in field crops in function of the working process parameters. This model is then experimentally validated through on stand tests which simulate the real working conditions.
    Actual Tasks on Agricultural Engineering, Opatija -Croatia; 02/2015
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    ABSTRACT: The traction bar as well as other traction devices should be checked in terms of resistance which ensures while driving to the tractor-trailer aggregate. This may be verified by finite element analysis (ANSYS, COSMOS, KATIA, etc.) or by testing under simulated and accelerated special equipment. This paper presents the results obtained by finite element analysis of the traction bar from a 200 HP tractor (after discretization model), determining the requested most powerful items and high-risk areas where fractures can occur, or after stress examination on the testing installation under simulated and accelerated regime to determine if in the following requests appear deformations or ruptures within.
    Actual Tasks on Agricultural Engineering, Opatija -Croatia; 02/2015
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    ABSTRACT: Seats designed for equipping tractors and other means of transportation are usually tested under simulated testing and accelerated installations in order to determine the protection level which they can provide to those who sit on it for transport on public roads which usually travel with maximum speed (40 or 50 km / h, depending on the tractor). Normally these are not correctly sized after the performed optimization with specific programs, the seatback being too rigid or excessively elastic. The present paper presents a numerical model simulation for testing the resistance of a tractor seat that allows fast and precise of area determination subjected to high voltages, along with performed verification in real conditions by testing resistance under accelerated regime on a specialized stand, in order to determine if this ensures operator’s safety.
    Actual Tasks on Agricultural Engineering, Opatija -Croatia; 02/2015
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    ABSTRACT: Seats designed for equipping tractors and other means of transportation are usually tested under simulated testing and accelerated installations in order to determine the protection level which they can provide to those who sit on it for transport on public roads which usually travel with maximum speed (40 or 50 km / h, depending on the tractor). Normally these are not correctly sized after the performed optimization with specific programs, the seatback being too rigid or excessively elastic. The present paper presents a numerical model simulation for testing the resistance of a tractor seat that allows fast and precise of area determination subjected to high voltages, along with performed verification in real conditions by testing resistance under accelerated regime on a specialized stand, in order to determine if this ensures operator’s safety.
    Actual Tasks on Agricultural Engineering, Opatija -Croatia; 02/2015
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    ABSTRACT: Precision for sowing is essential in order to achieve sowing quality works for hoeing plants, ultimately influencing the high productions obtaining. This paper presents a comparative study regarding the sowing accuracy obtained in laboratory conditions on a special stand, using 3 different row units: one individual transmission and two centralized transmissions for the seed distribution devices. The researches were developed for three working speeds, three different plant densities per hectare using corn as seed material.
    Actual Tasks on Agricultural Engineering, Opatija -Croatia; 02/2015
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    ABSTRACT: Precision for sowing is essential in order to achieve sowing quality works for hoeing plants, ultimately influencing the high productions obtaining. This paper presents a comparative study regarding the sowing accuracy obtained in laboratory conditions on a special stand, using 3 different row units: one individual transmission and two centralized transmissions for the seed distribution devices. The researches were developed for three working speeds, three different plant densities per hectare using corn as seed material.
    Actual Tasks on Agricultural Engineering, Opatija -Croatia; 02/2015
  • Valentin Vlăduţ · Sorin-Ştefan Biriş · Sorin Tiberiu Bungescu · Nicolae Herişanu
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    ABSTRACT: The paper proposes an analysis of vibrations within many Romanian and foreign harvesters provided with tangential threshing unit, analysing the influence which these ones have on the human operator's health. The determination of vibrations has been performed on the basis of accelerations measured at various frequencies, on the three directions: x, y and z (by means of the accelerometers mounted on the main working parts of the harvester), tracing the nomographs representing the limits up to which these frequencies are not dangerous for the operator's health.
    Applied Mechanics and Materials 09/2013; Vol. 430:290-296. DOI:10.4028/www.scientific.net/AMM.430.290 · 0.15 Impact Factor
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    Matache M. · Voicea I. · Vlădut V. · Pirnă I. · Bungescu S. · Chirilă C.
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    ABSTRACT: In the article there are presented experimental models of electro-conductivity and productivity agricultural maps obtained on soil type chernozem Cambic, obtained in the the western area of Romania on the experimental plots belonging to USAMVB Timisoara. Monitoring of the two soil characteristics (electro-conductivity and productivity) was made through complex experiments that took place with specific tools and equipment for precision farming concept. Electro-conductivity datas were obtained using a system for determining the soil elctro-conductivity VERIS 3150 MSP, and those of productivity with a monitoring system for grains production type MICRO TRAK mounted on the MDW 527 STS combine with which the experiments were performed. Also we took soil samples in order to realize and a physical and chemical characterization of soil type chernozem Cambic specific to the area analyzed within the article.
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    ABSTRACT: Agriculture is a basic economic branch through its impact on social life and the environment. We can speak of agriculture without having to refer to environmental consequences. Super intensive agriculture practiced due to technological level reached, has led to increased degradation of the environment and human life, requiring the concept of sustainable agriculture, in which the resource conservation is a fundamental condition. System of sustainable agriculture is increasingly accepted as an alternative to conventional agriculture, rational use of resources ensuring productivity, profitability and environmental protection. Agricultural productivity is influenced by the applied work technology, phyto-sanitary protection occupying an important place in these technologies. Combating pests and diseases is an important link in the process of growing plants. Use of new plant varieties and applying new technologies in preparation of germinative bed would not give the desired results without the application of phyto-sanitary appropriate treatments. Running with superior quality indices, of this work, influence decisively the production obtained per hectare. It is a fact accepted by everybody that phyto-sanitary treatments in agriculture, including fruit growing, namely fertilizers, herbicides, pesticides and other substances, chemicals, led to a considerable increase yields, improving their quality. In Romania, the treatment plant or some fazes fertilization works only with liquids that are prepared with water or conditioned with some particular organic ingredients, to be applied as such.
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    Vlăduţ V. · Matache M. · Biriş S. · Paraschiv G. · Bungescu S.
    01/2009; 14(1).
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    ABSTRACT: Within the article there are presented models of agricultural production maps made from the data obtained by a monitoring system for grain production MICRO TRAK type mounted on different types of harvesters (combines), used in the locations where the experiments were performed. Thus, in the first part of the article the concept of precision agriculture and its usefulness in the current economic situation is presented. In "Materials and methods" there is a description of the technical equipment used to make further experiments, as well as the choice of locations for their achievement. As a result of the conducted experiments, there were experimental yield map models obtained; their analysis and utility of the used system are presented in the concluding part of the paper. Introduction Precision agriculture (PA) is a model that is about the application in all highly developed countries and seeks a modulating inputs management (seeds, irrigation water, fertilizers, fungicides, herbicides, insecticides) by adapting the work of soil, sowing, the fertilizers to the heterogeneity characteristics of the plot. Precision farming being the agriculture seen as an application of mechatronics, makes way for a new methodology (it aims at new agriculture) which can be the key to many more problems. The opportunities favorable for the development of precision agriculture are as follows: • ability to understand the complexity of agricultural systems – a systemic and holistic approach; • ability to monitor events and systems – computer-controlled data acquisition; • achievements in the field of computer hardware, software and database fireware; • improvements in the interpretation and calculation methods, statistics, modeling, simulation, decision support systems – DSS • development of geographical information systems – GIS • emergence and development of spatial and statistical analysis – Geostatistical; • progress in space technology – remote sensing, GPS; • technical developments in the automation and improvement of agricultural machinery – agricultural mechatronics [1].
  • Ş. Biri ş · S. T. Bungescu
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    ABSTRACT: b U.S.A.M.V.B. Timişoara, Faculty of Zootechny and Biotechnology, Calea Aradului, No. 119, Timişoara, ROMANIA SUMMARY Within the framework of this paper, a mathematical model is presented for the computation of the main constructive and functional parameters for the falling-film evaporator used in the sugar industry. The paper shows also, 2D and 3D diagrams, using Microsoft Excel and Mathcad programme, which allow the visualization of the quantitative and qualitative dependence between the main constructive and functional parameters of these evaporators.

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