Intervalo hídrico ótimo e porosidade de solos cultivados em área de proteção ambiental do sul de Minas Gerais

Lima, Vico Mendes Pereira; Oliveira, Geraldo César de; Severiano, Eduardo da Costa; Oliveira, Luiz Fernando Coutinho de

doi:10.1590/s0100-06832009000500002

Cited by 8 publications

(8 citation statements)

References 21 publications

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“…However, results obtained by the manual operation of the equipment depend on the operator's experience and skill due to the uncertainty of maintaining a constant penetration rate during determination (BIANCHINI et al, 2002). The determination of SPR values in undisturbed soil samples can be performed with the use of a bench top electromechanical penetrometer (Figure 3a) (TORMENA et al, 1998;SERAFIM et al, 2008;LIMA et al, 2009;CALONEGO & ROSOLEM, 2011) or a bench top dynamic mini cone penetrometer (Figure 3b) . In these cases, it is possible to control the water content of soil samples, with greater accuracy, during analysis (SÁ & SANTOS JUNIOR, 2005).…”

Section: Penetrometer Models and Their Qualitiesmentioning

confidence: 99%

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: Penetrometer Models and Their Qualitiesmentioning

confidence: 99%

Use of penetrometers in agriculture: a review

et al. 2014

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“…Other studies has been realized to modifies the conventional system of water management utilized (VERMA; SHARMA, 2008;FREDDI et al, 2009), with decrease of costs in the irrigated areas. In non irrigated systems, the LLWR also has been a basic indicator of management system and crop development with positive impact on structural quality and agricultural productivity (LIMA et al, 2009;LIMA et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Least limiting water range and degree of compactness of soils under no- tillage

Lima¹,

Suzuki²,

Reinert³

et al. 2015

Biosci. J.

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ABSTRACT:The least limiting water range (LLWR) and degree of compactness (DC) can be useful indicators of soil physical quality and crop yield. This study focused on assessing of LLWR, DC and evaluation of critical values to crop growth of an Alfisol and Oxisol under no-till management. Undisturbed soil cores were taken from the layer 0.00 -0.20 m depth. Soil water retention curve, soil penetration resistance curve, air-filled porosity and bulk density (Bd) were measured. The range of LLWR variation was limited by volumetric water content at field capacity and penetration resistance. Values of LLWR varied from 0.00 -0.14 m 3 m -3 to Alfisol and 0.

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“…ci. Solo, 36:71-78, 2012 realizadas em diferentes solos, culturas e sistemas de manejo comprovam a pertinência da aplicação do IHo na avaliação da qualidade física do solo (Kaiser et al, 2009;lima et al, 2009;medeiros et al, 2011).…”

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