Operating performance of an agricultural tractor fitted with two types of tyres under two types of terrain

Bahia, Tainara Regina Cerutti Torres; Souza, Cristiano Marcio Alves de; Barbosa, Jackson Antonio; Orlando, Roberto Carlos

doi:10.5935/1806-6690.20250011

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Scientific Article • Rev. Ciênc. Agron. 56 • 2025 • https://doi.org/10.5935/1806-6690.20250011 copy

Operating performance of an agricultural tractor fitted with two types of tyres under two types of terrain¹ 1 This research was part of the master’s thesis of the lead author, presented to the Postgraduate Program in Agricultural Engineering of the Federal University of Grande Dourados

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The correct use of tyres on agricultural tractors, in respect of the terrain and the type and internal pressure of the tyre, are factors that influence the performance of the tractor. The aim of the present study was to evaluate the operating performance of an agricultural tractor fitted with two types of traction device (radial and diagonal tyres) at different pressures, and operating on soil with two levels of moisture. The experiment was conducted on a dystrophic Red Yellow Argisol, with tests to evaluate the performance of the tyres under specific working conditions. Tractive power and tractive force, wheel slip and fuel consumption were evaluated. For each of the conditions under evaluation, the radial configuration showed better performance than the diagonal configuration, the effect being more significant at the lower pressure and under low soil moisture. The use of radial tyres led to an increase in traction capacity and drawbar power, with a reduction in fuel consumption, especially at higher slip rates.

Keywords:
Tractive efficiency; Agricultural mechanisation; Agricultural tyres

Factor for analysis	bpR x apR	bpD x apD
	Drawbar force
F(H0)	0.3915^ns	0.7035^ns
T-test for variability	11.143*	2.814*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes
	Drawbar power
F(H0)	0.6306^ns	1.1850^ns
T-test for variability	10.212*	1.856^ns
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes
	Hourly fuel consumption
F(H0)	1.4430^ns	4.6175*
T-test for variability	1.483^ns	1.464^ns
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes

Factor for analysis	bpR x bpD	apR x apD
	Drawbar force
F(H0)	0.07268^ns	0.4843^ns
T-test for variability	8.513*	9.602*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes
	Drawbar power
F(H0)	0.13^ns	1.49^ns
T-test for variability	8.039*	8.228*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes
	Hourly fuel consumption
F(H0)	0.12^ns	2.32^ns
T-test for variability	2.759*	4.002*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes

Factor for analysis	bpR x apR	bpD x apD
	Drawbar force
F(H0)	0.8928^ns	0.5001^ns
T-test for variability	14.525*	10.975*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes
	Drawbar power
F(H0)	2.3374^ns	1.5484^ns
T-test for variability	17.203*	20.957*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes
Hourly fuel consumption
F(H0)	6.9367*	2.5815^ns
T-test for variability	0 994ns	4.268*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes

Factor for analysis	bpR x bpD	apR x apD
	Drawbar force
F(H0)	0.22^ns	0.05^ns
T-test for variability	7.276*	8.084*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes
	Drawbar power
F(H0)	0.46^ns	0.24^ns
T-test for variability	7.000*	5.456*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes
	Hourly fuel consumption
F(H0)	0.18^ns	0.08^ns
T-test for variability	0.976^ns	1.340^ns
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes

Factor for analysis	apR	bpR	apD	bpD
Factor for analysis	U1 x U2	U1 x U2	U1 x U2	U1 x U2
Drawbar force
F(H0)	0.2824^ns	18.3540*	0.1298^ns	0.1338^ns
T-test for variability	4.884*	42.650*	6.659*	2.631*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes	Yes	Yes
Drawbar power
F(H0)	0.5394^ns	140.1481*	0.2338^ns	0.1827^ns
T-test for variability	5.136*	90.088*	9.617*	2.455*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes	Yes	Yes
Fuel consumption
F(H0)	1.7183^ns	0.4683^ns	32.8545*	2.5806^ns
T-test for variability	1.419^ns	1.389^ns	3.038*	2.296*
$r_{Y_{j} Y_{1}} \geq \| 1 - \bar{e} \| ?$	Yes	Yes	Yes	Yes

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Operating performance of an agricultural tractor fitted with two types of tyres under two types of terrain1 1 This research was part of the master’s thesis of the lead author, presented to the Postgraduate Program in Agricultural Engineering of the Federal University of Grande Dourados

ABSTRACT

Operating performance of an agricultural tractor fitted with two types of tyres under two types of terrain¹ 1 This research was part of the master’s thesis of the lead author, presented to the Postgraduate Program in Agricultural Engineering of the Federal University of Grande Dourados