Resistência do solo à penetração, após o tráfego com dois tipos de pneus utilizando-se um equipamento para ensaio dinâmico

Nagaoka, Alberto Kazushi; Lanças, Kléber Pereira; Neto, Pedro Castro; Lopes, Afonso; Guerra, Saulo Philipe Sebastião

doi:10.1590/s1415-43662003000200034

Cited by 3 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the depth of 20 to 40 cm, the values of soil resistance to penetration decreased as soil depth increased, both in the row and in the traffic of the tractor tire, resulting in similar values (Figure 3). NAGAOKA et al (2003), studying the penetration resistance of the soil after the traffic of the tractor with different types of tire, found higher values in the layer from 10 to 20 cm than in the one from 0 to 10 cm, for the studied types of tires.…”

Section: Resultsmentioning

confidence: 77%

Oxisol resistence to penetration in no-till system after sowing

et al. 2011

View full text Add to dashboard Cite

If inappropriately conducted, management and sowing practices may compromise the environment and the profitability of the agricultural activity. The aim of this study was to analyze the furrow opener mechanisms action and the level of load applied to soil firming mechanism in no-till, on the Oxisol resistance to penetration during soybean sowing, under three soil moistures. The experiment was arranged in split-split plot design, in which the plots were composed by three soil moistures (23.8; 25.5 and 27.5% b.s.), two furrow opener mechanisms subplots (double disks and furrow plough) and the split-split plot of three levels of load applied to soil firming mechanism (12.2; 18.5 and 24.1 kPa), according to randomized blocks design, with three replications. The soil moisture provided different resistance behavior to penetration with the depth, on the seedbed, independently of the furrow opener and the level of load applied to soil firming mechanism. The furrow plough use provided less soil resistance to penetration when compared to the double disk furrow opener, on the seedbed, independently of the soil moisture and the level of load applied to soil firming mechanism. The pressure applied by soil firming mechanism of 18.5 kPa provided the lower resistance to penetration, when the furrow plough was used. The soil resistance to penetration was less on the sowing line than on between rows, with 20 cm deep.KEYWORDS: furrow opener mechanism, soil firming mechanism, soil compaction. RESISTÊNCIA DE UM LATOSSOLO VERMELHO DISTROFÉRRICO À PENETRAÇÃOEM SISTEMA PLANTIO DIRETO APÓS SEMEADURA RESUMO: Práticas de manejo e semeadura mal conduzidas podem comprometer o meio ambiente e a rentabilidade da atividade agrícola. O objetivo deste trabalho foi estudar a ação de mecanismos sulcadores e a pressão da roda compactadora de uma semeadora-adubadora em plantio direto, na resistência de um Latossolo Vermelho distroférrico à penetração (RP), durante a semeadura da soja, sob três teores de água do solo. O experimento foi desenvolvido em esquema de blocos casualizados, arranjado em esquema de parcelas subsubdivididas, sendo as parcelas constituídas de três teores de água do solo (23,8; 25,5 e 27,5% b.s.), as subparcelas de dois mecanismos sulcadores (discos duplos e haste sulcadora) e as subsubparcelas de três pressões da roda compactadora (12,2; 18,5 e 24,1 kPa), com três repetições. O teor de água do solo promoveu diferença na RP com a profundidade, no leito de semeadura, independentemente do sulcador e da pressão da roda compactadora. O uso de haste sulcadora proporcionou menor RP comparada com o sulcador disco duplo, no leito de semeadura, independentemente do teor de água e da pressão da roda compactadora. A pressão aplicada pela roda compactadora de 18,5 kPa proporcionou as menores resistências do solo à penetração, quando a haste sulcadora foi usado. A RP foi menor na linha de semeadura do que na entrefileiras, até 20 cm de profundidade.

show abstract

Section: Resultsmentioning

confidence: 77%

Oxisol resistence to penetration in no-till system after sowing

et al. 2011

View full text Add to dashboard Cite

show abstract

“…With the objective of evaluating the traffic effects of tires with different tread construction characteristics (radial or diagonal) and the applied loads on the soil, Nagaoka et al (2003) used cone penetrometers, concluding that the increasing of load applied, causes an increment on penetration resistance, and this fact is credited to the bulk density increase. It was also detected the effect due to different types of tire construction.…”

Section: Introductionmentioning

confidence: 99%

Penetration resistance in a latosol under different moisture and penetration speeds

2013

View full text Add to dashboard Cite

RESUMO Resistência à penetração num Latossolo sob diferentes umidades e velocidades de penetraçãoA resistência do solo à penetração tem sido muito utilizada, para representar seu estado de compactação, e vários autores têm relacionado o índice de cone (IC) com a densidade do solo. Sua importância como fonte de informações para decisões na condução das atividades agrícolas, pecuária e florestal tem-se tornado cada vez maior, o que exige mais conhecimentos a respeito do comportamento dos penetrômetros e penetrógrafos. Este estudo teve o objetivo de verificar, em condições controladas de laboratório, a influência do teor de água do solo e da velocidade de penetração do cone para a obtenção do índice de cone, quando ocorre variação da densidade. O solo foi compactado por compressão por meio de uma prensa universal dentro de um cilindro especialmente construído para produzir os corpos de prova. Foram determinadas as densidades de amostras retiradas dos corpos de prova e suas respectivas umidades. Os valores de IC obtidos situaram-se entre 0,258 e 4,776 Mpa, medidos para solos, com quatro graus de umidade e sete graus de densidade, em três velocidades de penetração. Concluiu-se que a determinação do IC é fortemente influenciada pela umidade do solo, o que não ocorreu com a variação da velocidade de penetração, nos limites do estudo. No entanto, a diminuição do teor de água do solo pode aumentar a sensibilidade, na detecção da variação da densidade pelo uso do índice de cone. The soil penetration resistance has been used to represent the compaction situation and several authors have attempted to relate the cone index (CI) with the bulk density. The importance of using the CI as source of information for decisions in agricultural activities, livestock and forestry manner, has become increasingly larger, which requires more knowledge about the penetrometers and penetrographs behavior. This study aimed to verify, in controlled laboratory conditions, the influence of soil water content and cone penetration rate to obtain the cone index, when density variation occurs. The soil was compacted by compression through a universal press cylinder which was specially designed to produce the test specimens. Bulk densities were determined from samples taken from the test specimens and their moisture content. The CI values obtained were between 0.258 and 4.776 MPa, measured in 4 moistures and 7 soil densities with 3 penetration speeds. It was concluded that the determination of IC is strongly influenced by the soil moisture but the penetration speed variation, used in this study, was not sufficient to influence the IC determination. However, the decrease in soil water content may increase the sensitiveness to detect a variation in bulk density by the use of cone index. Palavras

show abstract

Impacto del tráfico de equipos durante la cosecha de caña de azúcar (Saccharum officinarum)

Rodríguez

Valencia

2012

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

R ESU M OPara determinar el impacto del tráfico sobre el suelo, el cultivo y el consumo energético durante la cosecha de caña de azúcar en el valle del río Cauca (Colombia), se establecieron experimentos de cuatro repeticiones con diferentes sistemas de cosecha. En cada sitio se cosecharon mecánicamente parcelas con vagones de auto volteo, HD8000, HD12000 y HD20000, se evaluaron por la intensidad de tráfico (IT), el pisoteo directo sobre la cepa, la resistencia a la penetración y el consumo energético. Vagones grandes y pesados causaron mayor IT y mayor efecto por compactación y pisoteo. La IT varió entre 241 y 317 Mg km ha -1. El pisoteo en la cabecera varió de 8 a 18 m por surco y sobre la cepa los vagones pisaron entre 5 y 24% de su ancho. Hubo diferencias no significativas en productividad hasta de 13,9% favorable a los vagones livianos. En cosecha semimecánica, realizada con trenes de vagones, disminuyó la IT al rango 60-113 Mg km ha -1 , pero aumentó el pisoteo en las cabeceras hasta 39 m por surco, hubo diferencias no significativas en productividad hasta del 4% entre sistemas de vagones livianos y pesados. Además, los vagones livianos con manejo adecuado de la cosecha, llegan a ser favorables por menor consumo de combustible y emisiones.Palabras-clave: intensidad de tráfico, pisoteo, vagón, consumo de combustible Impact of traffic equipment during sugarcane (Saccharum officinarum) harvest A B ST R A C T This study was carried out to determine the impact of traffic on soil compaction, crop and energy consumption during the sugarcane harvest in the Cauca river valley (Colombia). Four experiments with four replicates were harvested with different systems. Plots were mechanically harvested with self tipping, HD8000, HD12000 and HD20000 trailers and evaluated by traffic intensity (IT), direct stool traffic, penetration resistance and fuel consumption. Heavy trailers caused a greater effect due to a greater IT and direct stool traffic. IT varied between 241 and 317 Mg km ha -1. Stool traffic at the end of field varied from 8 to 18 m per furrow, meanwhile stool traffic along the furrow varied from 5 to 24%. There were no significant differences for productivity up to 13.9% favoring light trailers. Semi-mechanical harvesting was realized with trains of trailers, IT fell down to a 60 -113 Mg km ha -1 range because a larger area is harvested during one pass of the equipment, but stool traffic increased up to 39 m per furrow for the longer trains, there was a 4% non significant difference for productivity from light to heavy trailers. Furthermore, light trailers with an adequate management are better options with lower energy consumption and emissions.

show abstract

Resistência do solo à penetração, após o tráfego com dois tipos de pneus utilizando-se um equipamento para ensaio dinâmico

Cited by 3 publications

References 2 publications

Oxisol resistence to penetration in no-till system after sowing

Oxisol resistence to penetration in no-till system after sowing

Penetration resistance in a latosol under different moisture and penetration speeds

Impacto del tráfico de equipos durante la cosecha de caña de azúcar (Saccharum officinarum)

Contact Info

Product

Resources

About