Morphological characterization of solute flow in a brown earth grassland soil with cranefly larvae burrows (leatherjackets)

Holden, Joseph; Gell, Katherine F.

doi:10.1016/j.geoderma.2009.06.006

Cited by 11 publications

(8 citation statements)

References 48 publications

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“…The decrease in K sat from site 1 to 2 was most likely due primarily to the drastic increase in shear stress (210%) with high friction force of the lugs on the firm soil, below the loose soil layer, and secondarily to the slight increase in normal contact stress (11%). (Figure 7), illustrated that few but intact and efficient macropores were present to transport the major portion of water and solute downward (Alaoui & Goetz, 2008;Holden & Gell, 2009), supporting the theory that earthworm burrows act as dominant flow pathways for preferential flow. At the trafficked site with 27% slip (Figure 7), the zone of efficient macropores (0.30 m depth) disappeared, most likely replaced by another type of pores as indicated by the homogeneous distribution of dye-tracer density throughout the soil profile up to 0.50-0.60 m depth.…”

Section: Hydrological Aspectsmentioning

confidence: 52%

Impact of Normal and Shear Stresses Due to Wheel Slip on Hydrological Properties of an Agricultural Clay Loam: Experimental and New Computerized Approach

Battiato¹,

Alaoui²,

Diserens³

2015

JAS

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The main purpose of this study was to evaluate the effect that mechanical stresses acting under the slipping driving wheels of agricultural equipment have on the soil's pore system and water flow process (surface runoff generation during extreme event). The field experiment simulated low slip (1%) and high slip (27%) on a clay loam. The stress on the soil surface and changes in the amounts of water flowing from macropores were simulated using the Tires/tracks And Soil Compaction (TASC) tool and the MACRO model, respectively. Taking a 65 kW tractor on a clay loam as a reference, results showed that an increase in slip of the rear wheels from 1% to 27% caused normal stress to increase from 90.6 kPa to 104.4 kPa at the topsoil level, and the maximum shear contact stress to rise drastically from 6.0 kPa to 61.6 kPa. At 27% slip, topsoil was sheared and displaced over a distance of 0.35 m. Excessive normal and shear stress values with high slip caused severe reductions of the soil's macroporosity, saturated hydraulic conductivity, and water quantities flowing from topsoil macropores. Assuming that, under conditions of intense rainfall on sloping land, a loss in vertical water flow would mean an increase in surface runoff, we calculated that a rainfall intensity of 100 mm h -1 and a rainfall duration of 1 h would increase the runoff coefficient to 0.79 at low slip and to 1.00 at high slip, indicating that 100% of rainwater would be transformed into surface runoff at high slip. We expect that these effects have a significant impact on soil erosion and floods in steeper terrain (slope > 15°) and across larger surface areas (> 16 m 2 ) than those included in our study.

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Section: Hydrological Aspectsmentioning

confidence: 52%

Impact of Normal and Shear Stresses Due to Wheel Slip on Hydrological Properties of an Agricultural Clay Loam: Experimental and New Computerized Approach

Battiato¹,

Alaoui²,

Diserens³

2015

JAS

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“…Soil fauna can impact soil hydrological functioning and vice versa (Holden and Gell, 2009;Fischer et al, 2014). Earthworm density and diversity were different between land cover types at the study site.…”

Section: Discussionmentioning

confidence: 90%

The role of hedgerows in soil functioning within agricultural landscapes

Holden

Grayson

Berdeni

et al. 2019

Agriculture, Ecosystems & Environment

102

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“…Under favorable conditions, endogeic earthworm populations can turn over up to 10-15% of the topsoil mass per year (Curry and Schmidt, 2007). However, other macrofaunal 'ecosystem engineers' (Jones et al, 1994) also affect soil structure and preferential flow, including ants (Wang et al, 1994), termites (Léonard and Rajot, 2001), and even cranefly larvae (Holden and Gell, 2009). 1; Jarvis et al, 2010).…”

Section: What Factors Control the Structure Hierarchy?mentioning

confidence: 99%