Application of Electro- Geophysical and laboratary methods in soil quality assessment for lowland rice production in Obubra local government area, cross river state


  • Egor, A. O Department of Physics, Cross River University of Technology, Nigeria
  • Adedokun, I. O Department of Physics, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria
  • Uquetan, U. I Department of Geography and Environmental Science, University of Calabar, Nigeria
  • Osang, J. E Department of Physics, River State University Port Harcourt, Nigeria.
  • Isreal-Cookey C Department of Physics, River State University Port Harcourt, Nigeria
  • Oba, J. O Department of Physics, Cross River University of Technology, Nigeria


Rice production, lowland soil, physicochemical properties, Electrical Resistivity


Maintenance and monitoring of soil fertility is a key issue for sustainable lowland soil management. Vital ecosystem processes may be affected by management practices that change the physical, chemical, and biological properties of the soil. This study used Electrical resistivity (ER) as a nondestructive nor non-invasive method to rapidly determine lowland soil properties in the field. The study explored the correlation between ER and lowland soil properties on twenty plots of rice paddies soil in Obubra. ER measurements were used to determine soil-sampling locations and samples were analyzed in the laboratory for pH, EC, organic matter content (OM), Total Nitrogen (TN), Available phosphorus, Ca, Mg, K, Al3, H, ECEC, BS, Mn, Fe, Sand, Silt, Clay, Bulk density (BD) and texture. Even though the magnitude of correlation was modest, we were able to assess variation in soil properties, having chemically analyzed the sample, which is confirmatory to ER results. The sampling design based on an ER survey allowed us to map basic soil properties with a small number of samples. The result showed that there is a strong positive correlation between Electrical Resistivity and soil properties as R2 = 0.775 and the Correlation between ER and individual soil properties are ECEC (0.69), Ca (0.66), Mg (0.64), clay (0.64), Zn (0.59), Bs (0.53), H (0.4) and Organic Matter  (0.46), while Total Nitrogen  (TN) (0.25), Available Phosphorus  (AP) (0.39), Na (0.30), K (0.26), Al (0.30), Mn (0.30), Cu (0.04), Silt (0.08) and pH (-0.13), Mn (0.30), Cu (0.04), Silt (0.08) and BD (0.17) were weakly correlated with ER. Negative correlation existed between ER and pH (-0.13), EC (-0.06), Fe (-0.12) and sand (0.67). Juxtaposing the Electrical resistivity and statistical results with that of the analyzed samples, it is obvious from the ER sections that the soils are made up of sand, clay, and shale which are sources of the physicochemical parameters obtained from the laboratory analysis.


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Author Biographies

Osang, J. E, Department of Physics, River State University Port Harcourt, Nigeria.

Department of Physics, Cross River University of Technology, Nigeria

Cross River State Emergency Management Agency (SEMA)

Department of Physics, Arthur Javis University, Cross River State, Nigeria

Oba, J. O, Department of Physics, Cross River University of Technology, Nigeria

Managing Director, Tecil Integrated Services LTD Cross River State, Nigeria


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How to Cite

Egor, A. O, Adedokun, I. O, Uquetan, U. I, Osang, J. E, Isreal-Cookey C, & Oba, J. O. (2020). Application of Electro- Geophysical and laboratary methods in soil quality assessment for lowland rice production in Obubra local government area, cross river state. To Physics Journal, 6, 19-43. Retrieved from



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