Determining Salinity in Field Soils with Soil Resistance Measurements

Rhoades, J. D.; Ingvalson, R. D.

doi:10.2136/sssaj1971.03615995003500010020x

Cited by 102 publications

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“…Apparent soil electrical conductivity(ECa)has been widely used from 1970s (Rhoades and Ingvalson, 1971;Rhoades and van Schilfgaarde, 1976). ECa is an instant, easy and reliable way to obtain spatial characterization of soil salinity.…”

Section: Introductionmentioning

confidence: 99%

GIS-mapping spatial distribution of soil salinity for Eco-restoring the Yellow River Delta in combination with Electromagnetic Induction

Liu

Zhang

et al. 2016

Ecological Engineering

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a b s t r a c tSoil salinization is one of serious ecological problems around the world, which seriously restricts the stability of ecosystem and the economic development of agriculture. Mapping and monitoring spatial distribution of soil salinity is important for management of ecology and agriculture. This study was carried out to explore the spatial distribution of soil salinity in the Yellow River Delta using the portable device EM38-MK2 with geostatistical analysis. Apparent soil electrical conductivities were measured under four kinds of measurement modes (0.5H, 0.5 V, 1.0H and 1.0 V, respectively). The results revealed that electrical conductivity of 1:5 soil to water extract (ECe) varied from 0.965 to 1.872 dS m −1 for all sampled soil profiles, and the salinity of topsoil was the highest, which indicated that soil soluble salts accumulated to the surface. The salinity in the top layer showed strong spatial variability while salinities of other layers were moderate. Soil salinity displayed a significant zonal distribution, gradually decreasing with the increase of distance to the coastline. The regions with high ECa values were located in the north and the east of the study area, whereas regions with low ECa values were located in the south and the west parts. The correlation coefficient showed that salinities of adjacent two soil layers reached a significant level of 0.01, and gradually decreased with increasing soil depth. The linear interpretation models with ECa as independent variables and ECe as dependent variables for each depth were with R 2 between 0.828 and 0.919. The interpretation models, taking ECa and ECe of 0-15 cm depth as independent variables, and ECe of each layer in 15-100 cm depth as dependent variables, were with higher R 2 between 0.930 and 0.953. The mean error (ME) showed that there was small positive deviation in 40-100 cm whereas a high positive deviation in the topsoil (0-40 cm). The scatter plots also indicated that the models had better accuracy of salinity estimation in the top soil layers (0-80 cm). The results provides solid basis for eco-restoring in the Yellow River delta.

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Section: Introductionmentioning

confidence: 99%

GIS-mapping spatial distribution of soil salinity for Eco-restoring the Yellow River Delta in combination with Electromagnetic Induction

Liu

Zhang

et al. 2016

Ecological Engineering

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“…The first applications in agriculture were on soil water (Edlefsen and Anderson 1941) and salinity (Rhoades and Ingvalson 1971), but a major diffusion of the technique in the 1980s is linked to the development of precision agriculture, based on optimization of agricultural management within a field. Technologically, this was also made possible by the growing availability of GPS which allowed the use in dynamic mode.…”

Section: Principles Of Geophysical Techniques For Agriculturementioning

confidence: 99%

Geophysical Techniques for Plant, Soil, and Root Research Related to Sustainability

Bitella

Rossi

Loperte

et al. 2015

The Sustainability of Agro-Food and Natural Resource Systems in the Mediterranean Basin

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The sustainable management of human activities, from production to waste disposal and the cycling of finite resources, is one of the great challenges of research for the coming decades, stemming from societal needs and the growing awareness of environmental mechanisms.Research on geophysical methods provides an interdisciplinary approach to such challenges by addressing the need for techniques to assist in designing and monitoring strategies for sustainability in agriculture and other environment-related sciences.In the past few decades, technological advances have produced new tools or have improved existing techniques for near-surface geophysical investigation in a robust, cost-effective, and noninvasive way. Experimental results have proved that soil physical properties thus detected and mapped can be used as a proxy of physical, chemical, and biological features relevant for the appropriate management of soils, based on their behavior, spatial variability, and time dynamics.This chapter reviews principles of the techniques and reports selected research results on environmental and agronomic research.

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“…Conductivity readings combined with porosity measurements can give information on the stability of the ground [9][10] which can be extremely important in applications such as monitoring of train rail supporting structures. Electrical conductivity of soil solutions can also be a reliable indicator of ionic concentration and the practice of measuring soil apparent electrical conductivity to evaluate soil salinity has been spreading continuously since the 1970s [11][12]. A significant incentive for the determination of soil solution electrical conductivity from apparent electrical conductivity measurements has developed from the possibility of simultaneous measurements of apparent electrical conductivity and soil volumetric water content [13][14].…”

Section: Introductionmentioning

confidence: 99%

A novel thick-film electrical conductivity sensor suitable for liquid and soil conductivity measurements

Sophocleous

Atkinson

2015

Sensors and Actuators B: Chemical

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Results are reported from an initial evaluation of a novel conductivity sensor that could be incorporated onto a multi-element thick film (screen printed) sensor array designed for soil and water analysis. The new sensor exhibits a repeatable cell constant over a wide range of conductivities and is currently performing very well in an investigation of soil structural properties where its output is being correlated with soil water content in a study of different soil porosities.

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Determining Salinity in Field Soils with Soil Resistance Measurements

Cited by 102 publications

References 0 publications

GIS-mapping spatial distribution of soil salinity for Eco-restoring the Yellow River Delta in combination with Electromagnetic Induction

GIS-mapping spatial distribution of soil salinity for Eco-restoring the Yellow River Delta in combination with Electromagnetic Induction

Geophysical Techniques for Plant, Soil, and Root Research Related to Sustainability

A novel thick-film electrical conductivity sensor suitable for liquid and soil conductivity measurements

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