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Open access

Paweł Sobczak, Kazimierz Zawiślak, Jacek Mazur and Marian Panasiewicz

Abstract

The paper presents a change in physical properties of loose, dust fodder additives (aluminosilicate) after mixing them with oil or glycerine. Additives where mixed in a blade mixer with the same mixing time for all samples, which was 1 minute. Tests with oil or glycerine were carried out in the following amounts: 5%, 10%. For mixtures of additives with oil or glycerine a selected group of physical properties was determined. Method of determination of physical properties was the same for all samples i.e. the same additives − without oil and glycerine as well as mixtures with their participation. Obtained research results and their analysis unanimously indicate that adding any amount of oil or glycerine for additives improves selected physical properties of mixtures.

Open access

Agnieszka Wójtowicz

References ASTM D63805:2008. Standard test method for tensile properties of plastics . ASTM D882:2010. Standard test method for tensile properties of thin plastic sheeting. Brennan, J., Day, B. (2006). Packaging. In: Food Processing Handbook . Ed. J. Brennan, WILEYVCH Verlag GmbH & Co. KGaA, Weinheim, Germany, 291-350. Butler T.I., Morris B.A. (2013). PE-based multilayer film structures. In: Plastic Films in Food Packaging. Materials. Technology and Applications. Ed. Ebnesajjad S., Plastics Design Library, Elsevier Inc., Oxford, UK

Open access

Jerzy Bohdziewicz and Gabriel Czachor

fruit (cv. Nagami) with some physical attributes. International Journal of Biosciences, 5 (1), 82-88. Jaliliantabar, F. et al. (2014). Physical properties of kumquat fruit. International Agrophysics, 27 (1), 107-109. Li, X.Z. et al. (2013). Fruit biomechanics based on anatomy: a review. International Agrophysics, 27 (1), 97-106. Llanos, W.J. et al. (2013). Characterization of the mechanical properties of the cape gooseberry fruit ( Physalis peruviana L.). Agronomia Colombiana, 31 (1), 76-82. Puente, L.A. et al. (2010). Physalis peruviana

Open access

Krzysztof Pieczarka, Mateusz Kierdal, Krzysztof Lejman and Zygmunt Owsiak

Abstract

The research concern selected traction properties of Massey Ferguson 7475 wheeled tractor, which were carried out on various deformable surfaces i.e. soil: after ploughing, sodded and with rye fore crop. The impact of driving speed on tractive power and force with 2WD and 4WD drive was investigated. Physical and chemical properties of soil during testing were characterised by moisture, compactness and maximum shearing stresses. Studies on traction properties were carried out with the use of two tractors: Massey Ferguson 7475 and New Holland 5040. During measurements, tractors were connected with a tow rod, where a strain force transducer was mounted. The stand enabled also measurement of theoretical speed. As a result of analyses of the obtained results, characteristics of tractive force and towing power as a function of slip were made. The tests confirmed that the use of four-wheel drive is unjustified because it improves these tractive parameters of a tractor. It was reported that the maximum force and towing power are generated for the lowest values of slip which is equal to 0.1 on the sodded surface. However, value of this power is the lowest in comparison to other surfaces. The highest value of the adhesion coefficient was reported on soil with rye fore crop.

Open access

Gabriel Czachor, Jerzy Bohdziewicz and Krzysztof Kawa

References ASAE S269.4 Dec 96. Cubes, pellets and crumbles – definitions and methods for determining density, durability and moisture content . ASTM D 6128-06. Standard test method for shear testing of bulk solids using the Jenike shear cell. Bergström, i in. (2008). Effects of raw material particle size distribution on the characteristics of Scots pine sawdust fuel pellets . Fuel Processing Technology , 89, 1324-1329. Carone, M.T., Pantaleo, A., Pellerano, A. (2011). Influence of process parameters and biomass characteristics on the

Open access

Kinga Śnieg and Dariusz Błażejczak

References Aragón, A., García, M.G., Filgueira, R.R., Pachepsky, Ya.A. (2000). Maximum compactibility of Argentine soils from the Proctor test; The relationship with organic carbon and water content. Soil & Tillage Research, 56 , 197-204. Błażejczak, D. (2010). Prognozowanie naprężenia granicznego w warstwie podornej gleb ugniatanych kołami pojazdów rolniczych. Wyd. ZUT w Szczecinie. ISBN 978-83-7663-050-2. Błażejczak, D., Śnieg, K., Słowik, M. (2018). Comparison of Proctor and uniaxial compression tests for selected soils. Agricultural

Open access

Ignacy Niedziółka and Beata Zaklika

, H., Böhm, T. (2006). Comparative study of durability test methods for pellets and briquettes. Biomass and Bioenergy, 30 , 964-972. Terlikowski, J.(2012). Biomasa z trwałych użytków zielonych jako źródło energii odnawialnej. Problemy Inżynierii Rolniczej, 1 (75), 43-49. Wu, M.R., Schott, D.L., Lodewijks, G. (2011). Physical properties of solid biomass. Biomass and Bioenergy, 35 , 2093-2105.

Open access

Kinga Śnieg, Dariusz Błażejczak and Małgorzata Słowik

References Błażejczak, D. (2010). Prognozowanie naprężenia granicznego w warstwie podornej gleb ugniatanych kołami pojazdów rolniczych. Wyd. ZUT w Szczecinie. ISBN 978-83-7663-050-2. Błażejczak, D., Dawidowski, J.B. (2013). Problem wykorzystania gęstości objętościowej gleby w ocenie jej zagęszczenia. Journal of Research and Applications in Agricultural Engineering , Vol. 58 (1), 17-20. Błażejczak, D., Śnieg, K., Słowik, M. (2018). Comparison of Proctor and uniaxial compression tests for selected soils. Agricultural Engineering , Vol. 22

Open access

Jarosław Frączek, Karolina Słomka-Polonis, Krzysztof Mudryk, Marek Wróbel and Krzysztof Dziedzic

w procesie brykietowania wierzby Salix viminalis L. Inżynieria Rolnicza, 3(121), 45-52. Guo, L., Tabil, L. G., Wang, D., Wang, G. (2016). Influence of moisture content and hammer mill screen size on the physical quality of barley, oat, canola and wheat straw briquettes. Biomass & Bioenergy 94, 201-208. Hejft, R. (2002). Ciśnieniowa aglomeracja materiałów roślinnych. Wyd. i Zakład Poligrafii Instytutu Technologii Eksploatacji, Radom. ISBN 83-7204-251-9. Kalyan, N., Morey, R. V. (2009). Factors affecting strengh and