Evaluation of soil water content in tilled and cover-cropped olive orchards by the geoelectrical technique

Celano, Giuseppe; Palese, Assunta Maria; Ciucci, A.; Martorella, E.; Vignozzi, Nadia; Xiloyannis, Cristos

doi:10.1016/j.geoderma.2011.03.012

Cited by 50 publications

(32 citation statements)

References 23 publications

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“…Relationships between averaged ECa and SWC values followed the exponential model; this type of relationship was observed in earlier works (Celano et al, 2011;McCutcheon et al, 2006;Mishra et al, 2014). This exponential relationship held at SWCs below 0.11 kg kg -1 , but was not applicable at higher water contents, possibly because of the presence of complex vertical distributions of soil water content in the wet soil.…”

Section: Discussionsupporting

confidence: 72%

Temporal stability of electrical conductivity in a sandy soil

Pedrera‐Parrilla

Brevik

Giráldez

et al. 2016

International Agrophysics

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Understanding of soil spatial variability is needed to delimit areas for precision agriculture. Electromagnetic induction sensors which measure the soil apparent electrical conductivity reflect soil spatial variability. The objectives of this work were to see if a temporally stable component could be found in electrical conductivity, and to see if temporal stability information acquired from several electrical conductivity surveys could be used to better interpret the results of concurrent surveys of electrical conductivity and soil water content. The experimental work was performed in a commercial rainfed olive grove of 6.7 ha in the ‘La Manga’ catchment in SW Spain. Several soil surveys provided gravimetric soil water content and electrical conductivity data. Soil electrical conductivity values were used to spatially delimit three areas in the grove, based on the first principal component, which represented the time-stable dominant spatial electrical conductivity pattern and explained 86% of the total electrical conductivity variance. Significant differences in clay, stone and soil water contents were detected between the three areas. Relationships between electrical conductivity and soil water content were modelled with an exponential model. Parameters from the model showed a strong effect of the first principal component on the relationship between soil water content and electrical conductivity. Overall temporal stability of electrical conductivity reflects soil properties and manifests itself in spatial patterns of soil water content.

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Section: Discussionsupporting

confidence: 72%

Temporal stability of electrical conductivity in a sandy soil

Pedrera‐Parrilla

Brevik

Giráldez

et al. 2016

International Agrophysics

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“…Previous studies on SWC in Calcisols are scarce in spite of being a common soil in agricultural Mediterranean landscapes. Celano et al (2011) assessed the spatial and temporal variability of SWC in olive orchards in Italy managed with and without cover crops. In Spain, Ramos et al (2011) studied the effect of four soil management practices on the water content levels in rainfed almond orchards and Fernández-Ugalde et al (2009) found in semiarid cultivated soils with barley an increase of water availability under no-tillage practice in comparison with conventional tillage.…”

Section: Introductionmentioning

confidence: 99%

Spatial patterns and stability of topsoil water content in a rainfed fallow cereal field and Calcisol-type soil

López‐Vicente

Quijano

Izquierdo

2015

Agricultural Water Management

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Topsoil water content (TSWC) is a key factor for crop establishment and subsequent production, runoff generation, soil detachment, and other soil processes. TSWC is one of the most variable soil properties due to the complexity of water fluxes in the unsaturated zone. The studies about TSWC in cultivated Calcisols are limited and almost inexistent under fallow treatment in rainfed cereal fields. We hypothesize that certain wetness characteristics (patterns, ranges and changes) of a soil portion remain over time. This study seeks to identify the spatial patterns of TSWC and their temporal stability in a Mediterranean fallow rainfed cereal field (1.6 ha, partial stubble retention, no weed growth allowed) and Haplic Calcisoltype soil. During 15 months (December 2009 to February 2011) and 25 field surveys measurements were made at 156 points (3 values per point) by using a frequency-domain probe. Values of TSWC varied significantly and four humidity periods were identified using

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“…The majority of performed studies stress the promising capabilities of the ERT‐technique, but the difficulties to interpret the measured electrical resistivity remain, certainly under field conditions. First, as the resistivity is affected by several factors, the variability of these factors needs to be restricted or measured independently and a fitting calibration equation needs to be established (Michot et al, 2003; Celano et al, 2011; Garré et al, 2011). Second, possibly rapid changes in the plant‐soil continuum, such as a passing infiltration front after heavy rain or a tracer pulse, require high temporal resolution of the measurement to avoid temporal smearing (e.g., Koestel et al, 2009).…”

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confidence: 99%

Evaluating Experimental Design of ERT for Soil Moisture Monitoring in Contour Hedgerow Intercropping Systems

Garré

Günther

Diels

et al. 2012

Vadose Zone Journal

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Contour hedgerow intercropping systems have been proposed as an alterna ve to tradi onal agricultural prac ce with a single crop, as they are eff ec ve in reducing run-off and soil erosion. However, compe on for water and nutrients between crops and associated hedgerows may reduce the overall performance of these systems. To get a more detailed understanding of the compe on for water, spa ally resolved monitoring of soil water contents in the soilplant-atmosphere system is necessary. Electrical resis vity tomography (ERT) is poten ally a valuable technique to monitor changes in soil moisture in space and me. In this study, the performance of diff erent ERT electrode arrays to detect the soil moisture dynamics in a mono-and an intercropping system was tested. Their performance was analyzed based on a synthe c study using geophysical measures, such as data recovery and resolu on, and using spa al sta s cs of retrieved water content, such as an adjusted coeffi cient of varia on and semivariances. The synthe c ERT measurements detected diff erences between the cropping systems and retrieved spa al structure of the soil moisture distribu on, but the variance and semivariance were underes mated. Sharp water content contrasts between horizons or in the neighborhood of a root water uptake bulb were smoothened. The addi on of electrodes deeper in the soil improved the performance, but some mes only marginally. ERT is therefore a valuable tool for soil moisture monitoring in the fi eld under diff erent cropping systems if an electrode array is used which can resolve the pa erns expected to be present in the medium. The use of spa al sta s cs allowed to not only iden fy the overall model recovery, but also to quan fy the recovery of spa al structures.Abbrevia ons: ERT, electrical resis vity tomography.

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Evaluation of soil water content in tilled and cover-cropped olive orchards by the geoelectrical technique

Cited by 50 publications

References 23 publications

Temporal stability of electrical conductivity in a sandy soil

Temporal stability of electrical conductivity in a sandy soil

Spatial patterns and stability of topsoil water content in a rainfed fallow cereal field and Calcisol-type soil

Evaluating Experimental Design of ERT for Soil Moisture Monitoring in Contour Hedgerow Intercropping Systems

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