Characterisation of water transmission properties in tilled and untilled soils using tension infiltrometers

Reynolds, W. D.; Gregorich, E.G.; Curnoe, W. E.

doi:10.1016/0167-1987(94)00437-j

Cited by 70 publications

(91 citation statements)

References 17 publications

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“…The results show that in this soil only the connectivity and conductivity of macropores were affected, while the total volume did not change over time and with the crop, which is in agreement with the fact that soil compaction affects not only pore volume but also soil pore configuration (Green et al, 2003;Horn et al, 2003). The complex behavior of ε maR and ε meR can be explained by the fact that K depends on water-conducting porosity and on R 0 (Reynolds et al, 1995). Thus, for a given K, a "small" R 0ma value is compensated by a "large" ε maR value, and vice versa.…”

Section: Last Crop Effects On Soil Hydraulic Properties and On Soil Psupporting

confidence: 85%

“…Reynolds et al (1995) proposed using the flow-weighted mean pore radius R 0 (L), which represents an effective equivalent mean pore radius that is conducting water at a certain supply pressure head, and it has been used to characterize temporal and tillage-induced changes in water-conducting macropores (Messing & Jarvis, 1993;Reynolds et al, 1995;Sauer et al, 1990;Schwen et al, 2011). Following Reynolds et al (1995), R 0 is defined by…”

Section: Ry Methodsmentioning

confidence: 99%

“…Generally, R 0 indicates that with increasing h, larger pores become water conducting (Reynolds et al, 1995). Applying equation 1, we also calculated the maximum equivalent pore radius, C, that can be water conducting at a given supply pressure head (Reynolds et al, 1995;Moret & Arrúe, 2007).…”

Section: Ry Methodsmentioning

confidence: 99%

“…Applying equation 1, we also calculated the maximum equivalent pore radius, C, that can be water conducting at a given supply pressure head (Reynolds et al, 1995;Moret & Arrúe, 2007).…”

Section: Ry Methodsmentioning

confidence: 99%

“…The increase in R 0ma from the 1 st to the 3 rd year of the crop sequence indicates that the maize root system improved pore connectivity, possibly due to an enhanced soil structure (Schwen et al, 2011), and this may reflect a greater number of persistent cracks, worm holes, root channels, etc. (Reynolds et al, 1995). In contrast, the decrease in θ ma from the 1 st to the 3 rd year of the crop sequence could be due to the cumulative effect of machine traffic since under NT with random traffic, 100 % of the soil area is being trafficked by wheels (Rasaily et al, 2011).…”

Section: Last Crop Effects On Soil Hydraulic Properties and On Soil Pmentioning

confidence: 99%

See 4 more Smart Citations

Stabilization of soil hydraulic properties under a long term no-till system

Lozano

Soracco

Buda

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYThe area under the no-tillage system (NT) has been increasing over the last few years. Some authors indicate that stabilization of soil physical properties is reached after some years under NT while other authors debate this. The objective of this study was to determine the effect of the last crop in the rotation sequence (1 st year: maize, 2 nd year: soybean, 3 rd year: wheat/soybean) on soil pore configuration and hydraulic properties in two different soils (site 1: loam, site 2: sandy loam) from the Argentinean Pampas region under long-term NT treatments in order to determine if stabilization of soil physical properties is reached apart from a specific time in the crop sequence. In addition, we compared two procedures for evaluating water-conducting macroporosities, and evaluated the efficiency of the pedotransfer function ROSETTA in estimating the parameters of the van Genuchten-Mualem (VGM) model in these soils. Soil pore configuration and hydraulic properties were not stable and changed according to the crop sequence and the last crop grown in both sites. For both sites, saturated hydraulic conductivity, K 0 , water-conducting macroporosity, ε ε ε ε ε ma , and flow-weighted mean pore radius, R 0ma , increased from the 1 st to the 2 nd year of the crop sequence, and this was attributed to the creation of water-conducting macropores by the maize roots. The VGM model adequately described the water retention curve (WRC) for these soils, but not the hydraulic conductivity (K) vs tension (h) curve. The ROSETTA function failed in the estimation of these parameters. In summary, mean values of K 0 ranged from 0.74 to 3.88 cm h -1 . In studies on NT effects on soil physical properties, the crop effect must be considered.Index terms: infiltration, crop rotation, water-conducting porosity, no tillage, texture.( RESUMO: ESTABILIDADE DAS PROPRIEDADES HIDRÁULICAS DO SOLO EM UM SISTEMA DE PLANTIO DIRETO EM LONGO PRAZONos últimos anos, o sistema plantio direto (NT) tem aumentado. Alguns autores indicam que os atributos físicos do solo ficam estáveis após anos cultivando nesse sistema, sendo esse fato discutido por outros autores. O objetivo deste trabalho foi avaliar o efeito do último cultivo após a rotação (1º ano: milho; 2º ano: soja; e 3º ano: trigo/soja) sobre a configuração do sistema poroso do solo e das suas propriedades hidráulicas de diferentes tipos de textura (solo 1: franco; e solo 2: franco-arenoso) da região do pampa argentino, em NT por um longo prazo, para determinar se a estabilidade das propriedades físicas do solo independe do momento da rotação. Adicionalmente, foram comparados os procedimentos para avaliar a macroporosidade, bem como avaliada a eficiência da função de pedotransferência ROSETTA, para estimar os parâmetros do modelo de van Genuchten-Mualen (VGM) desses solos. A configuração do sistema poroso do solo e as propriedades hidráulicas não foram estáveis e se alteraram em razão da rotação da cultura e do último cultivo utilizado na rotação em ambos os solos. Nos dois locais, a condutiv...

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Section: Last Crop Effects On Soil Hydraulic Properties and On Soil Psupporting

confidence: 85%

Section: Ry Methodsmentioning

confidence: 99%

Section: Ry Methodsmentioning

confidence: 99%

“…Applying equation 1, we also calculated the maximum equivalent pore radius, C, that can be water conducting at a given supply pressure head (Reynolds et al, 1995;Moret & Arrúe, 2007).…”

Section: Ry Methodsmentioning

confidence: 99%

Section: Last Crop Effects On Soil Hydraulic Properties and On Soil Pmentioning

confidence: 99%

See 3 more Smart Citations

Stabilization of soil hydraulic properties under a long term no-till system

Lozano

Soracco

Buda

et al. 2014

Rev. Bras. Ciênc. Solo

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Effects of the spatial organization of agricultural management on the hydrological behaviour of a farmed catchment during flood events

Moussa

Voltz

Andrieux

2002

Hydrological Processes

185

148

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Abstract:Field limits, tillage practices and ditch networks constitute man-made hydrological discontinuities in farmed catchments, and are expected to influence hydrological response during flood events. The purpose of this study is to assess the role of human impact, especially the existence of tillage practices and ditch network, on flood events. The study area is the farmed catchment of Roujan (0Ð91 km 2 ) located in Southern France for which a spatially distributed hydrological model, MHYDAS, was developed and tested. The model considers the catchment as a series of interconnected field parts linked to the ditch network. Descriptions are provided for the main model procedures: computation of Hortonian excess rainfall on fields using the Green and Ampt approach, conversion of excess rainfall to surface runoff, interaction between ditch network and groundwater using a simple Darcian model and flood routing through the ditch network using the diffusive wave model. To analyse the role of both tillage practices and the ditch network, two sets of sensitivity analysis of the model were applied. The first set studied the role of tillage practices by comparing the actual spatial distribution of tillage practices on the catchment with three hypothetical scenarios. The second set studied the role of the ditch network by comparing the actual man-made ditch network with a hypothetical drainage network automatically extracted from a digital elevation model. Results show the importance of the role of tillage and the ditch network on the form of the hydrograph, the lag time, the runoff volume and the peak discharge. This technique could also be applied to study the impact of land use change on the hydrological behaviour of the catchment.

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Using Static and Dynamic Indicators to Evaluate Soil Physical Quality in a Sicilian Area

et al. 2013

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Both capacitive indicators derived from the water retention curve and dynamic measurements of the flow-weighted mean pore radius, R 0 , were used to assess the soil physical quality of two agricultural areas (cropland and olive orchard) and two natural areas (grassland and managed woodlot plantation) potentially subject to soil degradation. The overall idea of the study was to investigate whether a dynamic indicator quantitatively derived from hydraulic conductivity measurements could be used to supplement the traditionally applied capacitive indicators retrieved from water retention measurements. According to the available criteria, only the surface layer of the cropland site showed optimal soil physical quality. In the grassland and woodlot sites, the physical quality was deteriorated also as a consequence of compaction because of grazing. Overall, the physical quality was better in tilled than nontilled soils. The optimal soil in terms of capacitive indicators had hydraulic conductivity close to saturation that was intermediate among the different land uses, and it remained 1·3-1·9 times higher than that observed in the natural sites even when the largest pores emptied. A depth effect on R 0 was observed only when larger macropores were activated. It was suggested that water transmission parameters are more affected by changes in large pore domain. The plant available water content and Dexter's S-index showed inverse statistically significant regressions with R 0 . The empirical relationships were physically convincing given that, at increasing R 0 , the contribution of macropores increases, water is transmitted faster below the root zone and the soil's ability to store water is reduced.

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Characterisation of water transmission properties in tilled and untilled soils using tension infiltrometers

Cited by 70 publications

References 17 publications

Stabilization of soil hydraulic properties under a long term no-till system

Stabilization of soil hydraulic properties under a long term no-till system

Effects of the spatial organization of agricultural management on the hydrological behaviour of a farmed catchment during flood events

Using Static and Dynamic Indicators to Evaluate Soil Physical Quality in a Sicilian Area

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