Efficiency of Alfalfa Hay Mowing Machines under the Dryland Conditions

• Published in: Tehnički vjesnik Vol. 28; no. 5; pp. 1503 - 1510
• Main Authors: Stanisavljevic, Rade, Vukovic, Aleksandar, Petrovic, Dragan V, Radojevic, Rade L, Barac, Sasa, Mileusnic, Zoran, Tadic, Vjekoslav
• Format: Journal Article
• Language: English
• Published: Slavonski Baod University of Osijek 01.10.2021; Josipa Jurja Strossmayer University of Osijek; Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
• Subjects: Alfalfa; Cutting; Exploitation; Farm tractors; harvest; hay cutting; hay mowing machines; Mowing; Parameters; Regression coefficients; Tractors; working performance; Serbia
• ISSN: 1330-3651; 1848-6339
• DOI: 10.17559/TV-20200720092823

This paper presents the tests results of three types of hay mowing machines (later in text: mowers), namely a self-propelled oscillatory mower-conditioner and two tractor-mounted mowers with oscillatory and rotary blades, used to mow alfalfa grown under dry land conditions in the region of central Serbia during three seasons in 2014, 2015 and 2016. Although characterized by older design, they are still commonly used at smaller and medium size farms in this region. Therefore, their optimal exploitation parameters are still of large importance for hay quality and production efficiency and sustainability. The exploitation parameters of all three mowers generally increased linearly with higher speeds, having high [R.sup.2] values (over 0,8), with rare exceptions. The regression coefficients b clearly showed that the self-propelled mower-conditioner achieved maximum increase in production performance (b = 0,3606), compared with the oscillatory (b = 0,1158) and rotary mowers (b = 0,1414). Mower design had a significant (p [less than or equal to] 0,001) effect on cutting and chopping losses, production performance, and specific fuel consumption (p [less than or equal to] 0,05). The tests confirmed the superiority of the self-propelled mower over the two mowers aggregated with tractors.