Apparent soil electrical conductivity measurements in agriculture

Corwin, Dennis L.; Lesch, Scott M.

doi:10.1016/j.compag.2004.10.005

Cited by 767 publications

(482 citation statements)

References 135 publications

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“…ions in the complex, there was clearly visible an accumulation of alkaline cations in nature in the parent material horizon, which shows an increase in the reaction to alkaline. The reflection of physical and chemical processes that occur in soil, mostly the changes in the concentration of salts soluble in water, is the measurement of electrolytic conductivity (Corwin and Lesch 2005). The EC ranged from 0.17 to 3.20 dS m -1 and was highest at the profile I (1.18-3.20 dS m -1 ) (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Vertical distribution of phosphorus concentrations, phosphatase activity and further soil chemical properties in salt-affected Mollic Gleysols in Poland

Lemanowicz

Krzyżaniak

2015

Environ Earth Sci

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The paper demonstrates distribution of the content of total and available phosphorus and activity of the alkaline and acid phosphatase against the selected properties of salt-affected Mollic Gleysols. In the adequately prepared soil, the following were determined: pH, total organic carbon, the exchangeable cations (Ca, Mg, Na, K), salinity, the content of phosphorus, the activity of phosphomonoesterases. The distribution of the elements in the soil profiles was described with the value of the Distribution Index. To evaluate the availability of phosphorus, the Index of Mobility was used. The content of phosphorus varies, and it depends on physicochemical soil properties. Both the content of phosphorus available to plants and the activity of phosphatases in the profiles showed a high variation that depends both on the sampling date and on the depth. The lowest content of phosphorus was found in the profiles sampled in spring, during an intensive plant growth, while the greatest content was received in soil profiles sampled in summer. The research showed also a high variation in the time of the activity of phosphatases as well as their changes depending on the soil parameters, which was confirmed by the recorded values of the correlations between the activity of alkaline and acid phosphomonoesterases and the content of carbon, respectively, (r = 0.47, P \ 0.05) and (r = 0.62, P \ 0.05) as well as available phosphorus (r = 0.32, P \ 0.05) and (r = 0.38, P \ 0.05). A many-year seasonal salinity of soil did not decrease the activity of the phosphomonoesterases since it was mostly connected with the natural content of organic carbon.

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Section: Resultsmentioning

confidence: 99%

Vertical distribution of phosphorus concentrations, phosphatase activity and further soil chemical properties in salt-affected Mollic Gleysols in Poland

Lemanowicz

Krzyżaniak

2015

Environ Earth Sci

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“…This is particularly the case in coastal farming areas where soil salinization is the most frequently cited agricultural and environmental degradation problem for farmers (Haque 2006;Abdelfattah et al 2009). Electromagnetic induction instruments (e.g., Geonics Ltd. EM38), which measure apparent soil electrical conductivity in a fairly quick manner, have been widely used to provide information on the nature, origin, interpretation, and assessment of soil salinity (Corwin and Lesch 2005;Yao and Yang 2010;Herrero et al 2011). However, soil salinity at the field can have high spatial heterogeneity.…”

Section: Introductionmentioning

confidence: 99%

Accuracy and uncertainty assessment on geostatistical simulation of soil salinity in a coastal farmland using auxiliary variable

Yao

Yang

Shao

2012

Environ Monit Assess

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Understanding the spatial soil salinity aids farmers and researchers in identifying areas in the field where special management practices are required. Apparent electrical conductivity measured by electromagnetic induction instrument in a fairly quick manner has been widely used to estimate spatial soil salinity. However, methods used for this purpose are mostly a series of interpolation algorithms. In this study, sequential Gaussian simulation (SGS) and sequential Gaussian co-simulation (SGCS) algorithms were applied for assessing the prediction accuracy and uncertainty of soil salinity with apparent electrical conductivity as auxiliary variable. Results showed that the spatial patterns of soil salinity generated by SGS and SGCS algorithms showed consistency with the measured values. The profile distribution of soil salinity was characterized by increasing with depth with medium salinization (EC e 4-8 dS/m) as the predominant salinization class. SGCS algorithm privileged SGS algorithm with smaller root mean square error according to the generated realizations. In addition, SGCS algorithm had larger proportions of true values falling within probability intervals and narrower range of probability intervals than SGS algorithm. We concluded that SGCS algorithm had better performance in modeling local uncertainty and propagating spatial uncertainty. The inclusion of auxiliary variable contributed to prediction capability and uncertainty modeling when using densely auxiliary variable as the covariate to predict the sparse target variable.

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“…To measure these variations electrical geophysical investigations can be implemented to exploit the relative changes in resistivity/conductivity between saturated and unsaturated zones within the subsurface (Corwin and Lesch, 2005a). The most commonly implemented electrical technique to measure the distribution of resistivity/conductivity of soils is 'Electrical Resistivity Imaging (ERI)'.…”

Section: Justification Of Geophysical Analysismentioning

confidence: 99%

Tracing shallow lateral preferential pathways of fluid movement using electrical geophysics

Finn

Lackie

2018

ASEG Extended Abstracts

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Apparent soil electrical conductivity measurements in agriculture

Cited by 767 publications

References 135 publications

Vertical distribution of phosphorus concentrations, phosphatase activity and further soil chemical properties in salt-affected Mollic Gleysols in Poland

Vertical distribution of phosphorus concentrations, phosphatase activity and further soil chemical properties in salt-affected Mollic Gleysols in Poland

Accuracy and uncertainty assessment on geostatistical simulation of soil salinity in a coastal farmland using auxiliary variable

Tracing shallow lateral preferential pathways of fluid movement using electrical geophysics

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