Uso de dois penetrômetros na avaliação da resistência mecânica de um latossolo vermelho distrófico

Roboredo, Delmonte; Maia, João Carlos de Souza; Oliveira, Osvaldo J. de; Roque, Cassiano Garcia

doi:10.1590/s0100-69162010000200013

Cited by 22 publications

(23 citation statements)

References 8 publications

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“…The correlation coefficient among SPR readings provided by both devices in an Oxisol of medium texture was approximately 0.80 (ROQUE et al, 2003). However, for a clayey Oxisol (450 g kg -1 clay), this coefficient was 0.74 (ROBOREDO et al, 2010). The main measurement differences obtained for these devices may be attributed to the fact that dynamic devices record the maximum SPR values per unit of depth, while the static ones determine the values per unit area (HERRICK & JONES, 2002).…”

Section: Before Impact After Impactmentioning

confidence: 99%

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Use of penetrometers in agriculture: a review

et al. 2014

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Soil physical quality can be easily and quickly evaluated by using simple equipment to identify levels of soil compaction. Hence, it is necessary to know the variables responsible for changes in the soil penetration resistance (SPR). The aim of this review is to identify the main factors related to the various equipment used for assessing SPR as a soil physical quality indicator in agriculture. This literature review describes the different types of equipment used and its relationship with SPR. A wide range of procedures, devices, and equipments are available. Much of variability in SPR results is related to the equipment model, cone angle and diameter, and penetration rate. Usually, restrictions to root growth are correlated with SPR values above 2-3 MPa. However, comparisons of SPR values obtained under different soil moisture regimes in the same soil type have provided conflicting results of difficult interpretation. In order to minimize these problems, there is a need for standardization of measurement procedures and interpretation, and/or correction of SPR values according to a soil water content of reference.

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Section: Before Impact After Impactmentioning

confidence: 99%

“…The SPR values may be affected by several factors related to soil (SILVA et al, 2000a;2000b), determination method and, obviously, measuring instruments (ROBOREDO et al, 2010). Detailed knowledge of the influence of these factors on the results observed at field level is critical for obtaining structural indicators of soil quality.…”

Section: Introductionmentioning

confidence: 99%

Use of penetrometers in agriculture: a review

et al. 2014

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“…A pressão de equipamentos mecânicos provoca propagação da força exercida por unidade de área em profundidade, culminando na resposta do solo, na forma de diferentes valores de resistência mecânica ao longo do perfil, sendo esta altamente dependente da carga que é aplicada ao solo (Araújo, 2004). Roboredo et al (2010) comentam que o aumento e a variação da densidade do solo e da resistência mecânica à penetração em profundidade, normalmente, estão associados à uma compactação causada pelo manejo e preparo do solo, fato ocorrido na área em estudo, graças aos intensos revolvimentos do solo pelo cultivo do milho. Solos trabalhados sob sistema convencional são intensamente revolvidos, provocando alterações nas propriedades físicas.…”

Section: Resultsunclassified

Comparação entre dois penetrômetros na avaliação da resistência mecânica do solo à penetração

2013

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Comparison between two penetrometers in the evaluation of soil resistance to penetrationThe penetrometer is an instrument usually suitable for evaluating the penetration resistance of soil (PR). This study aimed to compare the performance of an electronic penetrometer and an impact penetrometer on the evaluation of the PR. The experiment was carried out at the experimental farm Chã-de-Jardim, CCA/UFPB, Areia -PB, in an area of Yellow Latossoil measuring 35 × 35 m. The impact penetrometer evaluated was an IAA/Planalsucar-Stolf and the digital penetrometer Falker PenetroLOG -PLG 1020, with electronic capability for data acquisition in 4 depths. Within the area, 40 points were sampled following two directions, North for the electronic penetrometer and South for the impact penetrometer, with the sample points of each penetrometer spaced 0.1 m apart. Data were analyzed following the analysis of variance of a completely randomized design. Both penetrometers showed means of 1.75 MPa, being similar on the evaluation of PR for all analyzed depths, suggesting that both devices can be used for soils with textural characteristics similar to those of this study.

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“…Due to the increasing use by farmers of systems that have less mobilization, such as no tillage (NT), many areas began to show compaction problems associated with no soil inversion (MUZARANA et al, 2011), which has resulted in productivity decrease (ROBOREDO et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Penetration resistance and agronomic characteristics of soybean affected by soil management and sowing speed systems

et al. 2016

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ABSTRACT:With the short period of the sowing process, we observed an increase in the seeder speed set in several soil management systems that may result in decreased soybean yield and problems with penetration resistance. We aimed to assess the penetration resistance (PR) and agronomic characteristics of soybean on soil tillage and sowing speed. The randomized block design in split plot with four replications was used. The treatments consisted of six management systems, applied to the plots: no tillage (NT), no tillage and chiseling (NTc), no tillage and cross chiseling (NTcc), conventional tillage (CT), reduced tillage (RT) and conservation tillage (CsT) and four speeds, (4.6; 5.5; 7,3 and 7.8 km h -1 ) applied in the subplot at the time of soybean seeding. We observed in the deep layers 0.0 -0.10; 0.10 -0.20 and 0.20 -0.30 m significant effect of tillage systems on the PR of the soil. The NT system showed the highest value of PR compared to other management systems studied. In the NT should be used sowing speeds above 5.5 km h -¹ to decrease the compression. Low speeds favor higher yield by improving pods per plant. Speeds in the working range (5-7 km h -1 ) promote higher productivity by improving the number of pods per plant, and provide better stand.

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Uso de dois penetrômetros na avaliação da resistência mecânica de um latossolo vermelho distrófico

Cited by 22 publications

References 8 publications

Use of penetrometers in agriculture: a review

Use of penetrometers in agriculture: a review

Comparação entre dois penetrômetros na avaliação da resistência mecânica do solo à penetração

Penetration resistance and agronomic characteristics of soybean affected by soil management and sowing speed systems

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