contact pressures and the impact of farm equipment on latosol with the presence and absence of sugarcane straw
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2016
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Abstract
ABSTRACT High contact pressures applied to soil result in a greater degree of compaction, in addition to promoting other negative effects. The objective of this study was to quantify contact areas by using different methodologies, and pressures of farm equipment employed in production activity and evaluate structural changes caused in a Red Latosol with the presence and absence of straw cover. The design was completely randomized in a factorial scheme of type 4 (tire on front axle, tire on rear axle, tire on a sugarcane wagon and metallic track of sugar cane Harvester) x 2 (presence and absence of straw). The contact area (CA) of the run was obtained by three procedures: analytical measure of the area of an ellipse (CA1); digital measurement of area of an ellipse (CA2); and measurement of real contact area (RCA), with digital resources. The contact pressure was calculated from the ratio of mass of each machine's axle and the contact area of the run. The contact area obtained according to the procedure of the ellipse (CA1 and CA2) is overrated when compared to actual area obtained digitally (RCA). The straw reduces the contact pressure in the soil, due to the deep tire treads and consequently, increased contact area. Areas where the traffic of the machines occurred with soil covered with the presence of straw showed reduced soil resistance to penetration, cone index and pre-consolidation pressure, confirming that the increased contact area produced by straw reduced the pressure applied and the compression power dissipated in the soil.
| Reference Key |
silva2016cinciacontact
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|---|---|
| Authors | ;Reginaldo Barboza da Silva;Piero Iori;Zigomar Menezes de Souza;Danilo de Moraes Gomes Pereira;Oswaldo Julio Vischi Filho;Francisca Alcivania de Melo Silva |
| Journal | information and software technology |
| Year | 2016 |
| DOI |
10.1590/1413-70542016403001716
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