Soybean development as a function of traffic of tractor with radial tires

Espessato, Renan R.; Leite, Fabrício; Guerreiro, Julio C.; Quiqui, Erci M. Del; Azevedo, Ana P. de; Aleixo, Edward V.

doi:10.1590/1807-1929/agriambi.v21n10p726-730

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ARTICLE • Rev. bras. eng. agríc. ambient. 21 (10) • Oct 2017 • https://doi.org/10.1590/1807-1929/agriambi.v21n10p726-730 copy

Soybean development as a function of traffic of tractor with radial tires

Desenvolvimento da cultura da soja em função do tráfego de trator com rodado radial

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study aimed to evaluate the development of soybean as a function of traffic levels of an agricultural tractor equipped with radial tires in two collection areas. The experiment was conducted in an area located at the State University of Maringá, Campus of Umuarama-PR, Brazil, in a soil classified as Red Oxisol with sandy texture. The experiment was set in a 5 x 2 factorial arrangement, with five levels of traffic on the same track (T1 = 1, T2 = 6, T3 = 11, T4 = 16 and T5 = 21 tractor passes), two collection areas (A1 = on the track and A2 = off the track) and four replicates. Soil physical parameters and characteristics of the soybean plants were evaluated. Soybean yield on the track did not show significant difference up to 6 passes. It was concluded that the traffic levels and soil resistance to penetration interfere with soybean yield for both collection areas.

Key words:
Glycine max L.; compaction; machine traffic

Machine weight - kg		kg hp^-1	Axle	Amount of water	Metal ballast	Advance (%)
Machine weight - kg		kg hp^-1	(%)		Metal ballast	Advance (%)
Front axle	2284	51.5	35.4	60	absent	1.8
Rear axle	4161		64.6	75	12 parts of 70 kg
Total weight	6445

SV	DF	Layer (m)
SV	DF	0-0.10	0.10-0.20	0.20-0.30	0.30-0.40
Traffic (F1)	4	12.5185 **	4.223 **	1.5424 ns	4.9694 **
Collection area (F2)	1	216.144 **	198.7481 **	61.0542 **	63.7473 **
F1 x F2	4	18.7964 **	14.75 **	3.6175 *	6.8711 **
CV%		16.8	19.92	24.98	17.97

Layer (m)		RP (MPa)
Layer (m)		T1	T2	T3	T4	T5
0-0.10	A1	0.87 c A	1.16 bc A	1.37 b A	1.92 a A	1.79 a A
0-0.10	A2	0.55 ab B	0.71 a B	0.79 a B	0.31 b B	0.76 a B
0.10-0.20	A1	1.30 c A	1.51 c A	1.66 bc A	2.28 a A	2.05 ab A
0.10-0.20	A2	0.83 a B	0.86 a B	1.04 a B	0.38 b B	0.88 a B
0.20-0.30	A1	1.66 b A	2.23 a b A	2.26 ab A	2.36 ab A	2.56 a A
0.20-0.30	A2	1.35 a b A	1.24 a b B	1.52 a B	0.62 b B	1.11 ab B
0.30-0.40	A1	1.99 b A	2.55 ab A	2.58 ab A	2.55 ab A	3.01 a A
0.30-0.40	A2	1.85 a A	1.89 a B	1.98 a B	0.69 b B	1.59 a B

SV	DF	Calculated F
SV	DF	PH	NP	RD	SD	Y
Traffic (F1)	4	5.2591 **	2.0259 ns	0.22188 ns	1.383 ns	35.551 **
Collection area (F2)	1	6.9369 **	0.3226 ns	6.6553 *	1.076 ns	28.609 **
F1 x F2	4	0.1450 ns	0.0926 ns	0.4496 ns	1.228 ns	0.6217 ns
CV (%)		7.34	22.68	14.39	20.66	6.20

		T1	T2	T3	T4	T5
PH (cm)	A1	85.41 b	86.81 b	94.60 ab	94.60 ab	101.61 a
PH (cm)	A2	83.87 a	81.07 a	90.20 a	90.20 a	93.05 a
Y (kg ha^-1)	A1	5995.97 a	5655.87 a	4790.83 b	4371.06 b	4425.0 b
Y (kg ha^-1)	A2	6500.92 a	5923.33 ab	5377.68 bc	5128.14 c	5016.6 c

	PH (cm)	RD (mm)	Y (kg ha^-1)
A1	93.21 a	1.42 a	5047.76 b
A2	87.68 b	1.26 b	5589.35 a
LSD	4.28	0.125	206.92

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[1] renanespessato@hotmail.com (Corresponding author)