Modelling of soil penetration resistance for an oxisol under no-tillage

Filho, João Tavares; Feltran, Clarissa Tieme Matsuda; Oliveira, José Francirlei de; Almeida, Edinei de

doi:10.1590/s0100-06832012000100010

Cited by 18 publications

(13 citation statements)

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“…The soil's resistance to penetration is an important attribute to be inferred, for it has direct correlation with the effects of machinery and is affected by the soil's density, total porosity, organic matter and moisture (TAVARES FILHO et al, 2012). Because of such relationships, the study of soil's resistance to penetration, among other attributes, is of fundamental importance for choosing the best system for soil preparation (RIBON; TAVARES or management system, in already cultivated soils, favours the maintenance of its physical qualities.…”

Section: Introductionmentioning

confidence: 99%

“…There is various literature that mentions the use of models or functions that identify the physical quality of the soil and demonstrate its influence over the compaction of the tropical soil is diverse ((IMHOFF et al, 2000;LEONEL et al, 2007;LIMA et al, 2007;TAVARES FILHO et al, 2012). However, the choice of statistical method influences the handling of the data.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Time Management in Modeling of Curve Resistance to the Penetration of a Latosol Under Different Uses and Management of Pastures and Native Woodland

et al. 2016

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The soil resistance to penetration study helps in understanding the state of soil compaction, indicating how best to manage it. The present study aimed to verify the influence of time management in modeling curves of resistance to penetration in Oxisol under different uses and management of pastures and woodland in field conditions, using the stepwise procedure. The study was conducted in the Cerrado region. Five (5) systems of uses and management of pastures and native woodland were evaluated: ILPF: crop-livestock-forest integration; ILP: crop-livestock integration; P: Area in the extensive grazing system; MN: native woodland; PIQ: rotated picket. The experiments were assessed for the years 2012/13 and 2013/14. To obtain the models, an analysis with four independent variables was performed: Gravimetric moisture (X1), bulk density (X2), total porosity (X3) and organic matter (X4) and the dependent variable, soil resistance to penetration (Y). The multiple regression analysis by STEPWISE with F of 0.15 was used. The equation that best estimated the resistance to penetration was RP = 14.68 to 0.26 for Native Woodland in layers from 0.20 - 0.40 m with R2 indices of 0.97 in year 1. For year 2, the equation that estimated the resistance to penetration was obtained in the PIQ treatment, PR = - 15.94 - 0.29 PT + 15.87 DS + 0.05 MO. with R2 of 0.94.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Time Management in Modeling of Curve Resistance to the Penetration of a Latosol Under Different Uses and Management of Pastures and Native Woodland

et al. 2016

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“…Therefore, compacted soil layers may not be detected if PR is assessed under high soil water contents (VAZ et al, 2011). Moreover, PR depends on other attributes such as the soil type (SILVA et al, 2009), organic matter content (TAVARES FILHO et al, 2012), soil texture (VAZ et al, 2011), soil compressibility (SILVA et al, 2002 and the metal-soil friction (DEXTER et al, 2007;SUN et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Soil penetration resistance in a rhodic eutrudox affected by machinery traffic and soil water content

Moraes¹,

Debiasi

Franchini

et al. 2013

Eng. Agríc.

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Soil compaction caused by machinery traffic reduces crop yields. This study aimed to evaluate the effects of intensive traffic, and the soil water content, on the soil penetration resistance (PR) of a Rhodic Eutrudox (Distroferric Red Latosol, Brazilian Classification), managed under no-tillage (NT). The experiment consisted of six treatments: NT with recent chiseling, NT without additional compaction, and NT with additional compaction by 4, 8, 10 and 20 passes of a harvester with a weight of 100 kN (70 kN on the front axle). Undisturbed soil samples were collected at 5.5-10.5 cm and 13.5-18.5 cm depth to quantify the soil bulk density (BD). The PR was assessed in four periods, using an impact penetrometer, inserted in the soil to a depth of 46 cm. The effect of traffic intensities on the PR was small when this variable was assessed with the soil in the plastic consistency. Differences in PR among treatments increased as the soil water content decreased. The increase in the values of PR and BD was higher in the first passes, but the increase in the number of traffics resulted in deeper soil compaction. The machinery traffic effects on PR are better characterized in the friable soil consistency.KEYWORDS: soil layers with mechanical impedance, no-tillage, soil compaction, soil consistency, soil profile. RESISTÊNCIA DO SOLO À PENETRAÇÃO EM LATOSSOLO INFLUENCIADA PELO TRÁFEGO AGRÍCOLA E O CONTEÚDO DE ÁGUA DO SOLO RESUMO:A compactação do solo causada pelo tráfego de máquinas reduz a produtividade das culturas. O objetivo deste trabalho foi avaliar os efeitos do tráfego intensivo e do conteúdo de água do solo na resistência à penetração (PR) de um Latossolo Vermelho distroférrico, muito argiloso, manejado em sistema plantio direto (NT). O experimento foi composto por seis tratamentos: NT escarificado; NT sem compactação adicional; e NT com compactação adicional pelo tráfego de uma colhedora com massa de 100 kN (70 kN no eixo dianteiro) por 4; 8; 10 e 20 passadas. A densidade do solo (BD) foi determinada utilizando amostras indeformadas, coletadas nas camadas de 5,5-10,5 cm e 13,5-18,5 cm. A RP foi determinada em quatro épocas, utilizando um penetrômetro de impacto, inserido no solo até a profundidade de 46 cm. O efeito das intensidades de tráfego no NT sobre a PR foi pequeno quando esta variável foi avaliada com o solo na consistência plástica. As diferenças na PR entre os tratamentos aumentaram à medida que o conteúdo de água no momento da avaliação diminuiu. O aumento nos valores de PR e BD foi maior nas primeiras passadas, mas o incremento do número de tráfegos aumentou a profundidade de compactação do solo. O aumento da PR proporcionado pelo tráfego de máquinas é mais bem caracterizado quando determinado com o solo na consistência friável.

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“…Este modelo foi escolhido porque, das principais variáveis utilizadas para explicar a R (ρ, θ, granulometria e matéria orgânica do solo), se obteve variação apenas da ρ e do θ na área experimental. Em solos com ampla variação de carbono, como o estudado por TAVARES FILHO et al (2012), pode haver efeito da matéria orgânica na R e o modelo de estimativa da R pode incluir essa variável preditora.…”

Section: Methodsunclassified

Valores críticos de densidade do solo avaliados por condições de contorno

2014

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RESUMO A associação irregular entre produção das culturas e densidade do solo (ρ) difi culta a aplicação da ABSTRACT The irregular association between crop production and soil bulk density (ρ) weakens the application of ρ for diagnosis and management of soil compaction. With the aim of evaluating this problem, this study introduce a mathematical procedure to simulate limits of ρ for water demand and soil penetration resistance (R) dynamic as a function of the time (t) of water extraction by crop evapotranspiration (E) of the soil layer explored by plant roots (L). Parameters of both penetration resistance and water retention curves of an Oxisol were used in the simulations of ρ and R for different conditions of E, t and L. The ρ varied inversely proportional to E and t and directly proportional to L. The equation of ρ also allows calculating the critical bulk density (ρ c ) calculated with the least limit water range (LLWR). Simulations done for up to six days of water extraction (t=6) in soil layers L with

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Modelling of soil penetration resistance for an oxisol under no-tillage

Abstract: Modelling of Soil Penetration reSiStance for an oxiSol...

Cited by 18 publications

References 24 publications

Influence of Time Management in Modeling of Curve Resistance to the Penetration of a Latosol Under Different Uses and Management of Pastures and Native Woodland

Influence of Time Management in Modeling of Curve Resistance to the Penetration of a Latosol Under Different Uses and Management of Pastures and Native Woodland

Soil penetration resistance in a rhodic eutrudox affected by machinery traffic and soil water content

Valores críticos de densidade do solo avaliados por condições de contorno

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