Wavelet coherency analysis to relate saturated hydraulic properties to soil physical properties

The 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 (1st year: maize, 2nd year: soybean, 3rd 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, K0, water-conducting macroporosity, εma, and flow-weighted mean pore radius, R0ma, increased from the 1st to the 2nd 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 K0 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.

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The impact of landscape evolution on soil physics: evolution of soil physical and hydraulic properties along two chronosequences of proglacial moraines

Earth System Science Data ◽

10.5194/essd-12-3189-2020 ◽

2020 ◽

Vol 12 (4) ◽

pp. 3189-3204

Author(s):

Anne Hartmann ◽

Markus Weiler ◽

Theresa Blume

Keyword(s):

Organic Matter ◽

Physical Properties ◽

Soil Properties ◽

Bulk Density ◽

Hydraulic Properties ◽

Organic Matter Content ◽

Soil Physical Properties ◽

Matter Content ◽

Data Set ◽

Soil Chronosequence

Abstract. Soil physical properties highly influence soil hydraulic properties, which define the soil hydraulic behavior. Thus, changes within these properties affect water flow paths and the soil water and matter balance. Most often these soil physical properties are assumed to be constant in time, and little is known about their natural evolution. Therefore, we studied the evolution of physical and hydraulic soil properties along two soil chronosequences in proglacial forefields in the Central Alps, Switzerland: one soil chronosequence developed on silicate and the other on calcareous parent material. Each soil chronosequence consisted of four moraines with the ages of 30, 160, 3000, and 10 000 years at the silicate forefield and 110, 160, 4900, and 13 500 years at the calcareous forefield. We investigated bulk density, porosity, loss on ignition, and hydraulic properties in the form of retention curves and hydraulic conductivity curves as well as the content of clay, silt, sand, and gravel. Samples were taken at three depths (10, 30, 50 cm) at six sampling sites at each moraine. Soil physical and hydraulic properties changed considerably over the chronosequence. Particle size distribution showed a pronounced reduction in sand content and an increase in silt and clay content over time at both sites. Bulk density decreased, and porosity increased during the first 10 millennia of soil development. The trend was equally present at both parent materials, but the reduction in sand and increase in silt content were more pronounced at the calcareous site. The organic matter content increased, which was especially pronounced in the topsoil at the silicate site. With the change in physical soil properties and organic matter content, the hydraulic soil properties changed from fast-draining coarse-textured soils to slow-draining soils with high water-holding capacity, which was also more pronounced in the topsoil at the silicate site. The data set presented in this paper is available at the online repository of the German Research Center for Geosciences (GFZ; Hartmann et al., 2020b). The data set can be accessed via the DOI https://doi.org/10.5880/GFZ.4.4.2020.004.

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Physical-hydraulic properties of a sandy loam typic paleudalf soil under organic cultivation of 'montenegrina' mandarin (Citrus deliciosa Tenore)¹

Revista Brasileira de Ciência do Solo ◽

10.1590/s0100-06832014000600023 ◽

2014 ◽

Vol 38 (6) ◽

pp. 1882-1889

Author(s):

Caroline Valverde dos Santos ◽

Renato Levien ◽

Sérgio Francisco Schwarz ◽

Michael Mazurana ◽

Henrique Belmonte Petry ◽

...

Keyword(s):

Physical Properties ◽

Hydraulic Properties ◽

Sandy Loam ◽

Soil Analysis ◽

Sampling Site ◽

Soil Physical Properties ◽

Water Infiltration ◽

Undisturbed Soil ◽

Organic Cultivation ◽

Citrus Deliciosa

Citrus plants are the most important fruit species in the world, with emphasis to oranges, mandarins and lemons. In Rio Grande do Sul, Brazil, most fruit production is found on small properties under organic cultivation. Soil compaction is one of the factors limiting production and due to the fixed row placement of this crop, compaction can arise in various manners in the interrows of the orchard. The aim of this study was to evaluate soil physical properties and water infiltration capacity in response to interrow management in an orchard of mandarin (Citrus deliciosa Tenore 'Montenegrina') under organic cultivation. Interrow management was performed through harrowing, logs in em "V", mowing, and cutting/knocking down plants with a knife roller. Soil physical properties were evaluated in the wheel tracks of the tractor (WT), between the wheel tracks (BWT), and in the area under the line projection of the canopy (CLP), with undisturbed soil samples collected in the 0.00-0.15, 0.15-0.30, 0.30-0.45, and 0.45-0.60 m layers, with four replicates. The soil water infiltration test was performed using the concentric cylinder method, with a maximum time of 90 min for each test. In general, soil analysis showed a variation in the physical-hydraulic properties of the Argissolo Vermelho-Amarelo distrófico arênico (sandy loam Typic Paleudalf) in the three sampling sites in all layers, regardless of the management procedure in the interrows. Machinery traffic leads to heterogeneity in the soil physical-hydraulic properties in the interrows of the orchard. Soil porosity and bulk density are affected especially in the wheel tracks of the tractor (WT), which causes a reduction in the constant rate of infiltration and in the accumulated infiltration of water in this sampling site. The use of the disk harrow and mower leads to greater harmful effects on the soil, which can interfere with mandarin production.

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Estimating the spatial relationships between soil hydraulic properties and soil physical properties in the critical zone (0–100 m) on the Loess Plateau, China: A state-space modeling approach

CATENA ◽

10.1016/j.catena.2017.10.006 ◽

2018 ◽

Vol 160 ◽

pp. 385-393 ◽

Cited By ~ 15

Author(s):

Jiangbo Qiao ◽

Yuanjun Zhu ◽

Xiaoxu Jia ◽

Laiming Huang ◽

Ming'an Shao

Keyword(s):

Physical Properties ◽

State Space ◽

Loess Plateau ◽

Hydraulic Properties ◽

Soil Physical Properties ◽

Critical Zone ◽

Spatial Relationships ◽

Soil Hydraulic Properties ◽

The Loess Plateau ◽

Space Modeling

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The impact of landscape evolution on soil physics: Evolution of soil physical and hydraulic properties along two chronosequences of proglacial moraines

10.5194/essd-2020-110 ◽

2020 ◽

Cited By ~ 1

Author(s):

Anne Hartmann ◽

Markus Weiler ◽

Theresa Blume

Keyword(s):

Organic Matter ◽

Physical Properties ◽

Soil Properties ◽

Bulk Density ◽

Hydraulic Properties ◽

Organic Matter Content ◽

Soil Physical Properties ◽

Matter Content ◽

Soil Chronosequence ◽

Top Soil

Abstract. Soil physical properties highly influence soil hydraulic properties which define the soil hydraulic behavior. Thus, changes within these properties affect water flow paths and the soil water and matter balance. Most often these soil physical properties are assumed to be constant in time and little is known about their natural evolution. Therefore, we studied the evolution of physical and hydraulic soil properties along two soil chronosequences in proglacial forefields in the Central Alps, Switzerland. One soil chronosequence developed on silicate and the other on calcareous parent material. Each soil chronosequence consisted of 4 moraines with the ages of 30, 160, 3000, and 10 000 years at the silicate forefield and 110, 160, 4900, and 13 500 years at the calcareous forefield. We investigated bulk density, porosity, the content of clay, silt, sand, and gravel as well as loss on ignition and hydraulic properties in form of retention curves and hydraulic conductivity curves. Samples were taken in three depths (10, 30, 50 cm) at six sampling sites at each moraine. Soil physical and hydraulic properties change considerably over the chronosequence. Particle size distribution shows a pronounced reduction in sand content and an increase in silt and clay content over time at both sites. Bulk density decreases and porosity increases during the first 10 millenia of soil development. The trend is equally present at both parent materials, but the reduction in sand and increase in silt content was more pronounced at the calcareous site. The organic matter content increases, which is especially pronounced in the top soil at the silicate site. With the change in physical soil properties and organic matter content the hydraulic soil properties change from fast draining coarse textured soils to slow draining soils with high water holding capacity, which is also more pronounced in the top soil at the silicate site. The dataset presented in this paper is available at the online repository of the German Research Center for Geosciences (GFZ, Hartmann et al. (2020b)). The dataset can be accessed via the link: http://pmd.gfz-potsdam.de/panmetaworks/review/f46bd4d822a0766a9c0baf356bc7e55644d65d62d7ab71527f5d80c35eed11e5 and will be published with the DOI specified under the link.

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