ISSN 2284-7995, ISSN Online 2285-3952
 

Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 24 ISSUE 1
Written by Georgiana Armenița ARGHIROIU, Silviu BECIU, Maria BOBEICĂ (COLPOȘ)

The paper aimed to follow the recent developments regarding the production and Romanian trade with fresh or dried walnuts in shell or shelled. Both statistical and specific indicators of international trade are used. The results indicated that Romania increased its production of walnuts and performed well in trade with shelled walnuts, and the trade balance was positive in the entire analysed period. Is not the case of the trade with walnuts in shell, where the trade balance was consistently negative. Most part of the Romanian trade with walnuts is either with EU countries or with the neighbour countries which are not EU members.

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ARGHIROIU G.A., BECIU S., BOBEICA (COLPOS) M. 2024, TRENDS IN ROMANIA'S TRADE WITH WALNUTS IN THE PERIOD 2010-2022. Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 24 ISSUE 1, PRINT ISSN 2284-7995, 55-60.

Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 24 ISSUE 1
Written by Tarek FOUDA

Modelling by Finite Element Method (FEM) and fatigue assessment of the single-screw of a press for obtaining fish oil through Solidworks software. Fish oil is a dietary supplement resulting from the tissues of fatty fish, such as salmon, mackerel, herring, and other different types of fish. It is rich in omega-3 fatty acids, and this oil is extracted using an extrusion machine. The objective of this study is to design and analyze extruder parts by finite element analysis at the Department of Agricultural Engineering - Faculty of Agriculture, Egypt. The functional parts of the machine include a feeder, nozzle (barrel), filter mesh, pressure chambers 1 and 2, screw axis, and finally a waste outlet. As for finite element analysis, 9 indicators were studied such as Von Mises, yield strength, INT (stress intensity), TRI (triaxle stress), static displacements, RFRES (resultant reaction), ESTRN (equivalent strain), SEDENS (strain energy density, and ENERGY (total strain energy), and the results for screw axle were (3.12e+07 N/m2, 1.72e+08 N/m2, 3.60e+07 N/m2, 3.71e+07 N/m2, 3.17e-02 mm, 1.91e+02N, 1.08e-04,1.41e+03 N.m/m3, 4.41e-15 N.m) when applied 100 N as a torque load, this axle can press 5 times the added weight of fish waste. Also, for screw axis, the results of fatigue indices such as load factor and biaxiality were (7.72e+08, and 9.34e-01) respectively.

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FOUDA T. 2024, USING FINITE ELEMENT METHOD AND FATIGUE ASSESSMENT OF SINGLE - SCREW FISH OIL EXTRUDER . Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 24 ISSUE 1, PRINT ISSN 2284-7995, 443-452.

Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 24 ISSUE 1
Written by Tarek FOUDA, Ali HASSAN, Mohamed GEASA

The experiments were conducted at Agricultural Engineering Department Laboratory, Faculty of Agriculture Al-Azhar University, Assiut Governorate during 29th of July to 15th of November 2022, in order to develop and manufacture a small unit for producing high quality black honey depends on heating and vacuum system. Also, to determine the optimum treatment forsafe method taken into consideration the environmental impact and evaluate changes in black honeyquality during cooking. This unit consisting of pan vessel, heater, compressor, condenser, rectifier, vessel receiver oil and smart control system.The experimental treatments for black honey cooking unit were tested on three heating temperatures different at 200, 350 and 500 oC and four vacuum levels at 150, 300, 450 and 600 mbar and atmospheric pressure.The results shows a decreasing of cooking time at vacuum pressure less than from atmospheric pressure. At vacuum pressure samples, cooking time ranged from 30 to 172 minutes. The highest cooking time was (177, 77and 40 minutes) recorded with atmospheric pressure at different heating temperatures (200, 350 and 500oC), respectively. The lowest cooking time was (155, 64and 30 minutes) recorded with vacuum pressure (-600 mbar) with different heating temperature (200, 350 and 500oC), respectively. The data shows an increasing of evaporation rate of water from sugar cane juice at vacuum pressure more than from atmospheric pressure. At vacuum pressure samples, evaporation rate ranged from 4.53to 26 gH2O/min. The lowest evaporation rate was (4.41, 10.13 and 19.50 gH2O/min) recorded with atmospheric pressure at different heating temperatures (200, 350 and 500oC), respectively. The highest evaporation rate was (5.03, 12.19 and 26 gH2O/min) recorded with vacuum pressure (-600 mbar) with different heating temperature (200, 350 and 500oC), respectively.

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FOUDA T., HASSAN A., GEASA M. 2024, USING HEATING AND VACUUM AS A NEW SYSTEM TO ACHIEVE SHORT COOKING TIME FOR PRODUCING BLACK HONEY. Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 24 ISSUE 1, PRINT ISSN 2284-7995, 417-426.

Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 24 ISSUE 1
Written by Tarek FOUDA, Abeer ABDELSALAM

The optical imagery at high spatial resolution to monitoring and observation of faba bean crop growth obtained from The Sentinel-2 sensor during November 2021 to February 2022 (daytime) were used. Thirteen bands of multispectral data covering the visible, near-infrared, and short wave infrared portions of the spectrum using to monitor land cover change for environmental monitoring. A surface emissivity calculation is the first step of land surface temperature observation and finding the agricultural indices of faba bean crop.The emissivity per pixel was obtained directly from Sentinel-2 sensor data. Natural surfaces at the resolution of 30 m are heterogeneous and they differ from each other in their emissivity. In the present study, surface emissivity was evaluated by analysis of NDVI, NDMI, SWIR, NDWI, Agriculture Composite, and SAVI of vegetation cover per pixel, and the maximum values of climatic indices such as sunshine duration, relative humidity, long, short wave radiation, ultraviolet radiation direct, diffuse radiation, soil temperature, FAO reference evapotranspiration (Eto.The results showed the monthly composite pictures which produced using to generate correct crop growth findings by comparing band reflectance values, vegetation indices, and environmental indicators.

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FOUDA T., ABDELSALAM A. 2024, USING HYPERSPECTRAL DATA FORMONITORING AND OBSERVATION OF FABA BEAN CROP GROWTH. Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 24 ISSUE 1, PRINT ISSN 2284-7995, 453-464.

Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 24 ISSUE 1
Written by Paula STOICEA, Mirela Elena DUȘA, Adrian-Gheorghe BĂȘA

Soybean is a crop with major benefits for the environment, under the conditions of using good agricultural practices, by fixing atmospheric nitrogen which reduces fertilization with mineral nitrogen and its leaching. The integration of soybean in the crop rotation is beneficial and can create conditions for its relaunch and long-term viability so that European consumption can be covered and the dependence on imports can be reduced. The case study carried out on two farms in Romania, South - Muntenia Region, highlighted that, under irrigation conditions, this crop had productions of over 4,000 kg/ha. The capitalization price increased during the analysis period, so the farms recorded a positive and ascending result in the period 2019-2021, except the 600 ha farm, which in 2019, recorded a loss because the crop was not irrigated and the production average (1,712 kg/ha) was insufficient for profit obtaining.

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STOICEA P., DUSA M.E., BASA A.G. 2024, YIELD AND PROFITABILITY OF SOYBEAN CROP . Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 24 ISSUE 1, PRINT ISSN 2284-7995, 973-978.

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© 2019 To be cited: Scientific Papers. Series “Management, Economic Engineering in Agriculture and Rural Development“.

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