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


Abe, S. S., Buri, M. M., Issaka, R. N., Kiepe, P., & Wakatsuki, T. (2010). Soil fertility potential for rice production. Journal of Agricultural Research quarterly. 44(4), 343 – 355.

Adeosun, J.O., Onyibe, J.E & Salako, E.O. (2005). Rice production in Nigeria. Extension bulletin No. 8 NAERLS, Amadu Bello University, Zaria, Nigeria. Pp.28

Agbor R. B., Ekpo I. A., Ekaluo U. B., Okpako E. C., Okigbo A. U., Osang, J. E. Kalu, S. E. (2013) Groundwater Quality Assessment of Selected Boreholes in Calabar: World Rural Observations 5(3) Http://Www.Sciencepub.Net/Rural.

Aghimien, E. A., Udo, E.J., & Ataga, O. (1988). Profile distribution of forms of iron and aluminum in the hydromorphic soils of southern Nigeria. J.W. Afri. Sci. Assoc. 31:57 -70.

Akande, T. (2003). An overview of the Nigeria rice economy. The Nigerian Institute of Social and Economic Research (NISER) Ibadan, Nigeria.

Akpan-Idiok, A. K., & Antigha, N. R. B. (2006). Soil Survey and Fertility Investigation of Obubra Irrigation/Drainage and Flood control Project. Nsecal Engineering Services – Calabar.

Amalu, U. C., Esu, I. E., & Nwulu, M. V. N. (2001). Fertility Management of Some Gleyic Luvisols and Alisols Grown to Rice in South East Nigeria: Boron, Copper and Zinc Status. Proceeding of the 27th Annual Conference of Soils Science society of Nigeria (SSSN), Calabar, pp 150 – 160.

Andrews, S.S., Karlen, D. L, &Canbardella C. A. (2004). The soil management assessment framework: A quantitative soil quality evaluation method. Soil Science Society of America Journal 68: 1945 – 1962

Auerswald, K; simon, S. and Stankkek, H. (2001) “Influence of soil properties on electrical conductivity under humid water regimes” Soil Sci. 166(6): 382-390.

Banton, O. Seguin, M. K. and Cimon, M.A (1997) “Mapping field-scape physical properties of soil and electrical resistivity” Soil Sci. Sco. AM. J. 61, 1010-1017.

Black, C. A. (1965). Methods of soil Analysis, Part I Physical and Mineralogical methods. Am. Soc. Agron ASA

Blake G. (1965) Bulk density: in Methods of soil analysis C. A. Black agronomy No, 9 part I. American Society of Agronomy. Madison, Wisconsin USA.

Blake, G. R. & Hartge, K. H. (1986). Bulk Density. p. 363-375. In A. Klute, ed., methods of soil Analysis, Part 1. Physical and mineralogical methods: Agronomy monograph No. 9 (2nd edition).

Bremmer, M.J.& Mulvany, C.S.(1982).Methods of soil analysis. Agronomic monograph of American Society of Agronomy. Madison,Wislonsin.9:1149-1179.

Bubba, M. O. Arias, C. A. & Briix, H. (2003). Phosphorus adsorption maximum of sand for use as media in subsurface flow cultivate dreed beds as measured by long Muir isotherm. Water resources 39:3390-3400.

Cross River Agricultural Development Project (CRADP) (1992). Report on the wetland soils of Cross River State, Nigeria. pp.115.

Deckers, J., Spaargaren, O., & Nachtergaele, F. (2001). Vertisols: Genesis, properties and soilscape management for sustainable development. In: Syers, J.K., Penning de Vries, F. and Nyamudeza, P. The sustainable management of Vertisols. CABI publishing.

Doran, J.W. & Parkin, T.B. (1996): Quantitative indicators of soil quality: A minimum data set. P. 25-37. In: Doran, J.W. and Jones, A.J. Methods for assessing soil quality. SSSA Spec. Publ. 49. SSSA, Madison, W.I.

Egor, A. O., Osang, J. E., Emeruwa C., Ebong, D. E., Uquetan, U. I., Bawan, A. M. (2016) Critical Study of Ground Water Potential of Obubra Local Government Area, Cross River State. International Journal of Scientific Technology Research. Vol. 4 Issue 10, ISSN 2277-8616 pp 122-126

Egor, A. O., Osang, J. E., Uquetan, U. I., Emeruwa C., Agbor, M. E. (2016) Inter-Annual Variability of Rainfall in some States of Southern Nigeria. International Journal of Scientific Technology Research. Vol. 4 Issue 10, ISSN 2277-8616 pp 134-154

Ekpo, I.A, Agbor, R.B, Ekaluo, U.B, Ikpeme, E.V, Kalu, S.E., Osang, J. E. (2013) Hepatotoxicity of Ipomoea Batatas Leaf Extract On Male Wistar Rats American International Journal Of Biology 1(1) Pp. 21-28

Enwezor, W. O., Ohiri, A. C., Opuwaribo, E. E. & Udo, E. J. (1989). Review of fertilizer use in crops in Southeastern Nigeria fertilizer procurement and distribution, Lagos, Nigeria. p.420.

Eshett, S. T. (1985).Soil Characteristics and Farming Systems in Northern Cross State of Nigeria, Ph.D Thesis, University of Ibadan, Nigeria.

Essoka,P. A. (2008).Soil variation over basement complex rocks and slope position im a part of Central Cross River plain, Southerh Nigeria. Ph.D Thesis, Department of Geography, ABU, Zaria.

Esu, I.E. (2010). Soil characterization, classification, and survey. Ibadan: Heinemann Educational Books Nigeria limited.

Ewona, I. O., Osang, J. E, Obi, E. O., Udoimuk A. B. , Ushie, P. O. (2013) Air Quality and Environmental Helath in Calabar, Cross River State, Nigeria; Iosr Journal Of Environmental Science, Toxicology And Food Technology (Iosr-Jestft) E-Issn: 2319-2402,P- Issn: 2319-2399. Volume 6, Issue 6, Pp 55-65 Www.Iosrjournal.Org.

Ewona, I. O., Osang, J. E., Udo, S. O. (2014) Trend Analyses Of Rainfall Patterns In Nigeria Using Regression Parameters; International Journal Of Technology Enhancements And Emerging Engineering Research, Vol 2, Issue 5 129 Issn 2347-4289.

Ewona, I. O., Osang, J. E., Uquetan, U. I., Inah, E. O., and Udo, S. O. (2016) Rainfall prediction in Nigeria using Artificial Neural Networks;International Journal Of Scientific & Engineering Research, Volume 7, Issue 1, Pp1157-1169, January 2016 1120 ISSN 2229-551

Eylachew, Z. (2001). Study on the physical, chemical and mineralogical characteristics of some vertisols of Ethipia, p.87-102. In: Wondimages C. and Engida, M. Nutrient management for improved soil/crop productivity in Ethopian agriculture. Proceedings of the fifth conference of the ESSS. March, 30-31. 2000. Addis Ababa. Ethiopia.

Ezeaku, P. I. & Amikwe, M. A. N. (2006). A model for description of water and solute movement in soil-water restrictive horizons across two landscapes in South-East Nigeria. Journal of Soil Science. 171(6): 492-500 (USA).

Fagbami, A., & Ajayi, F.O. (1990). Valley bottom soil of the sub-humid tropical southwestern Nigeria on basement complex: characteristics and classification.Soil Science and Plant Nutrition .,36,179 –194 .

Fertilizer Procurement and Distribution Division (FPDD).(1989). Literature on soil fertility investigation in Nigeria. Produced by the Federal Ministry of Agriculture and Natural Resources, Lagos.

Fertilizer Procurement and Distribution Division(FPDD) (1989). Fertilizer use and Management Practice for crops in Nigeria. Bobua publishers, Ibadan.

Fertilizer Production,Distribution and Division (FPDD) (1990). Literature Review on soil fertility Investment in Nigeria published by Federal Ministry of Agriculture and Natural Resources, Lagos.pp.281.

Filip, Z. (2002). International approach to assessing soil quality by ecologically-related biological properties. Agri., Ecosyst. Environ., 88, 169-174

Fisseha, I. (1992). Micro and macronutrient distributions in Ethiopian vertisol landscapes. Hahenheimer Bodenkundliche 2. Universitat Hohenhem, Stuttgart, pp.20.

Fixen, P. E. (2005). In: Proceedings of International symposium on information technology in soil fertility and fertilizer management. Beijing, P. R. China. September, 14-16. pp.58-66.

Food and Agricultural Organization (FAO) (1976).Food and Agricultural Organization. Framework for land evaluation. FAO bulletin 32, Rome.

Food and Agricultural Organization (FAO) (1996): Land Quality Indicators and Their Use in Sustainable Agriculture and Rural Development. Proceedings of the Workshop organized by the Land and Water Development Division FAO Agriculture Department and the Research, Extension and Training Division FAO Sustainable Development Department 25-26 January 1996.

Food and Agricultural Organization(FAO) (1974). Soil map of the World. Vo. I. Legend. Paris.

Food and Agricultural Organization(FAO) (1982). Potential population supporting capacities of lands in the Developing World. Report of project INT/75/p.13. Rome, Italy. p.139.

Gregorich, E. G., Carter, M. R., Angers, D. A. Monral, C. M. & Ellert, B. H. (1994). Towards a minimum data set to assess soil organic matter quality in agricultural soils. Canadian Journal of Soil Science. 74:367-385.

Holland, M. D., Allen, V. G, Barton, D., & Murphy,S. T. (1989).Land evaluation and Agricultural Recommendations of Cross River National Park, Oban Division prepared by ODNRI in collaboration with WWF for Federal Republic of Nigeria and the Cross River State.

Idoga, S.& Azagaku, D.E.(2005).Characterization and classification of soils of Janta Area,Plateau State of Nigeria. Journal of Soil Science, 15: 116 – 122.

Igwe O. Ewona, Osang, Jonathan E., Sunday O. Udo. (2014) An Assessment of Decadal Variation of Sunshine Duration in Nigeria. International Journal of Advance Research, IJOAR .org Volume 2, Issue 1, Online: ISSN 2320-9097.

International Institute for Tropical Agriculture (IITA), (1979). Selected Methods for Soils Analysis. Manual series No: 1 Reversed Edition. International Institute for Tropical Agriculture (IITA), Ibadan, Nigeria, 70pp.

International Rice Research Institute (IRRI) (2003). Rice science for better world.Rice Fact Sheets. tropric.

Jackson, M. I. (1960). Soil Chemical Analysis. Prentice Hall Englewood Cliffs, New York 379 – 383.

Karlen, D. L. Andrews, S. S. & Doran, J. W. (2001). Soil quality current concepts and applications. Advances in Agronomy. 71:1-40.

Kitchen, N. R., Sudduth, K.A. and Drummond, S. T. (1999) “Soil electrical conductivity as a crop productivity measure for claypan soils,” Prod. Agric, 607-617.

Kravchenko, A. N., Omonde, R., Bollero, G. A. and Bullock, D. G. (2002) “Quantitative mapping of soil drainage classess using topographical data and soil electrical conductivity, soil Sci: Soc. AM. J., 232-243.

Kyuma, K., Kosaki, T., & Juo, A. S. R. (1985). Evaluation of the Fertility of the Soils. In: A.S.R. Juo & Low. The wetland soil and rice in sub-sahara Africa. Proceeding in International Conference of Wetland Soil Utilization for rice production in sub-Sahara Africa. IITA, Ibadan, Nigeria, p.43-58.

Lal, R. (1990). Tropical soils: distribution, properties and management. Resource. Management and Optimization. 7:39-52.

Lal, R. (1994). Methods and guidelines for assessing sustainable use of soil and water resources in the tropics. SCS technical monograph. No. 21. Soil Management Support Services, Washington, DC, 78pp.

Landon, J. R. (1991).Booker Tropical Soil Manual: A handbook for soil survey and agricultural land evaluation in the tropics and sub tropics. England: longman Scientific and Technical Books.

Lar, R. (1993). Tillage, Effects on soil degradation, soil resilience, soil quality and sustainability. Soil and Tillage Research. Volume 27, issue 1-4, 1-8.

Larson, W. E., & Pierce, F. J. (1991). Conservation and Enhancement of Soil Quality. In: Dumanski, J., (1991).Evaluation for Sustainable Land Management in the Developing World. Proceedings of the International Workshop Chiang Rai, Thailand, 15 – 21, September 1991. Technical Papers, vol. 2 Int. Board for Soil Resources and Management, Bangkok, Thailand, pp 175 – 203.

Lindert, P. (1996). “The Bad Earth? China soil and agricultural soils and development since the 1930s.” Economic development and cultural change, Vol.47 No. 4 pp. 701-736.

Mckeague, J. A & Day, J. H. (1966) Dithionite and Oxalate Iron and aluminum as acids in differentiating various classes of soils. Canadian Journal of Soil Science 46:13-22.

Mohr, E. C. J., Van Baren, F. A. & Van Schuy Lenborgh, J. (1972). Tropical Soils. Mouton. The ratio Law Applied under field conditions. Plant and soil, 19:33-48.

Mukhopadhyay, D., Majumdar, K., Pati R.& Mandel, M. K. (2008). “Response of Rainfed Rice to Soil Test-Based Nutrient Application in Terai Alluvial Soils”. Better Crops, a Publication of the International Plant Nutrition Institute. (IPNI) Volume 92., 13 – 15.

Murage, E. W., Karanja, N. K., Smithson, P. C. & Woomer, P. L. (2000). Diagnostic indicators of soil quality in productive and non-productive smallholders fields of Kenya’s Central highlands. Agriculture, Ecosystems and Environment. 79:-8.

Naller, A. (1991) “Effect of Sol structure on bulk soil electrical conductivity (EC) using the TDR and 4p techniques”, Soil Sci. 152, 199-203.

Nelson, D. W. & Sommers, L. E. (1982). Total Carbon, Organic carbon and organic matter. P. 539-579. In: Page et al. Methods of soil analysis. Part 2. 2nd edition. Agronomy Monograph. 9. ASA and SSSA, Madison WI.

New Mexico State University (NMSU) (2000). Critical values of soil fertility indices for tropical soils. New Mexico State University Press. pp 24.

Nortcliff, S. (2002). Standardisation of soil quality attributes. Agriculture, Ecosystems and Environment. 88:161-168.

Nwaka, G. K. & Kwari,J.J. (2000). The nature and properties of the soils of Jere Bowl near Maiduguri in Borno State. Journal of Agriculture and Resources 16:25-40.

Obi E. O., Osang J. E., Pekene D. B. (2017) Environmental Effect of Gas Flaring on the Soil pH Value in Some Communities in Niger Delta of Nigeria; American Journal of Physics and Applications. Volume 4, Issue 6, Pages: 158-164.

Obi, E. O., Osang, J. E., Ewona, I. O., Udoimuk A. B., Kamgba, F. A. (2013):, Environmental Health Effect And Air Pollution From Cigarette Smokers In Cross River State, Nigeria; Iosr Journal Of Applied Physics (Iosr-Jap) E-Issn: 2278-4861. Volume 4, Issue 6, Pp 61-68; Www.Iosrjournal.Org

Obi, E. O., and Osang, J. E. (2016) Thermal Effect of Gas Flaring Activities in Ogba-Egbema- Ndomi Community, River State, Nigeria. International Journal of Energy and Environmental Research. Vol.3, No. 3 pp 75-80.

Obi, E. O., George, A. M., Ushie, P. O., Osang, J. E. (2016) Earthquake Prediction in Awi, Akamkpa Local Government Area of Cross River State, Nigeria. International Journal of Energy and Environmental Research. Vol.3, No. 3 pp 75-80.

Ogban, P. I.&Babalola, O. (1995). Characteristics of some hydromorphic soils from South Western Nigeria. African Soils. Vol. 28:147-165.

Ojanuga, A. G. (1975). Morphological, physical and chemical characteristics of soils of Ife and Ondo Area. Nigerian Journal of Science. 9, 225-269.

Ojar, J.U., Ushie, P. O., Osang, J. E., Ettah, E. B., Alozie, S. I. (2014) Assessment Of Environmental Radioactivity Around Coal Mine At Okaba, Kogi State Nigeria. Journal Of Current Research In Science (Issn 2322-5009) Coden (USA), Vol. 2, No. 1, pp:54-58 Available at

Okusami., T. A.& Rust, R. H. (1992). Occurrence, characteristics and charsification of some hydromorphic soils from south Nigeria. In: correlation meeting (viii ISCOM): Characterization, Classification and utilization of Wetland soils USA. Soil Conservation Service. National Soil Survey Centre, Lincoln, N. E.

Olaf, E. Lancon, F., Akande, S. O. Titilola, S. O. Akpokodje, G. & Ogundele, O. O. (2003). The Nigerian Rice Economy in a competitive world: Constraints, opportunities and strategic choices: Rice production systems in Nigeria., A survey. September, 2003. Development Association (WARDA) Abidjan, Cote d’ Ivoire.

Opeke, L. K. (2006). Essential of Crop Farming. Spectrum Books Limited. Ibadan.

Osang, J. E, Obi E.O, Ewona, I.O Udoimuk A.B, Nnwankukwu. (2013) Review Of Gas Flaring Activities In Niger Delta Area of Nigeria. International Journal Of Scientific & Engineering Research, Volume 4, Issue 9, September-2013 971issn 2229-5518 Http://Www.Ijsetr.Org.

Osang, J. E., Egor, A. O., Uquetan, U. I, Eze, B. E., Emeruwa, C., Pekene. D. B. J. (2016) Investigation of the Relative Humidity Profile Variations in Calabar, Nigeria. International Journal of Scientific & Engineering Research, Volume 7, Issue 1, January 2016., 1134 - ISSN 2229-5518

Osang, J. E., Udoimuk, A. B., Etta, E. B., Ushie, P. O., Offiong N. E. (2013) Methods Of Gathering Data For Research Purpose And Applications Using Ijser Acceptance Rate Of Monthly Paper Publication, Iosr Journal Of Computer Engineering (Iosr-Jce) E-Issn: 2278-0661, P- Issn: 2278-8727volume 15, Issue 2, Pp 59-65 Www.Iosrjournals.Org.

Osang, Jonathan Eyire, Obi, Emmanuel O. And Ewona, Igwe O. (2013) Evaluation Of The Effect Of Workshop/Laboratory Accidents And Precautionary Steps Towards Safety Practice. Iosr Journal Of Electronics And Communication Engineering (Iosr-Jece) E-Issn:2278-2834, P-Issn:2278-8735. Volume 6 Issue 3, Pp 16-22. Www.Iosrjournal.Org.

Osang,J. E., Uquetan,U. I. , Oko,P. E., Egor,A. O., Ekwok,S. E., and Ekpo, C. M. (2017)Effect on pH Value of Rain Water and Soil Ph in River State Nigeria. Elixir International Journal Environ. & Forestry 110 (2017) 48174-48183. ISSN 2229-712X. Www.Elixirpublishers.Com.

Osang. J. E.1, Ewona, I.O, Obi E. O., Udoimuk A,B, Kamgba F.A.,(2013); Analyses Of Radiation and Rainfall Pattern In Kano State Northern Nigeria (1978-2007), International Journal Of Scientific & Engineering Research, Volume 4, Issue 9, September-2013 971issn 2229-5518 : Http://Www.Ijser.Org.

Pekene, D. B. J., Agbo, P. E., Iduma, R. E. O., Amadi, S. O. and Osang, J. E. (2015) Influence of Radiative Heat and Mass transfer in Chemical Reactive Rotating fluid on a Stratified Steady State in a Porous Medium. International Journal of Energy and Environmental Research. Vol.3, No. 3 pp 32-74, December 2015.

Pozdnyakov, A. and Pozdnyakon, L. (2002) “Electric fields and soil properties in 17 world congress of soil Science” Bangkok, Thailand.

Pozdnyakov, A. I,. and Pozdnyakov. L (2009) Elctro-Geophysical methods for soil survey of Agricultural lands. Https://

Riley, J. (2001). The indicator explosion: local needs and international challenges. Agriculture, Ecosystems & Environment87: 119-120.

Sanchez, P. A. (2002). Soil fertility and hunger in Africa.Science, 295:2019-2020.

Sparks, D. L. (1997) “Environmental Soil Chemistry Academic Press

Struif Bontkes, T. H.,& Van Keulen (2003). “Modeling the dynamics of agricultural development at farm regional level. Agricultural systems, Vol. 76. pp.379-296.

Udo, E. J. (1980). Profile distribution of Iron Sesquioxides in selected Nigerian Soils. Journal of Agricultural Science. 95:191-1198.

Udoimuk, A. B., Osang, J. E., Ettah, E. B., ,Ushie, P. O., Egor, A. O., Alozie, S. I. (2014) An Empirical Study Of Seasonal Rainfall Effect In Calabar, Cross River State, Nigeria.; Iosr Journal Of Applied Physics (Iosr-Jap) E-Issn: 2278-4861. Volume 5, Issue 5, Pp 07-15 Www.Iosrjournal.Org.

Uquetan U. I.1, Eze E. B., Uttah C.., Obi E. O., Egor A. O., Osang J. E. (2017) Evaluation of Soil Quality in Relation to Landuse Effect in Akamkpa, Cross River State, Nigeria. Science and Education Publishing Journal, Applied Ecology and Environmental Sciences, Vol. 5, No. 2, Pp. 35-42.

Uquetan, U. I, Amah, A. E, Igelle, E.I, Egor, A. O., Ekpo, C. M. and Osang, J. E. (2017) Effect of Traffic Density on Soil along Nwanga-Ekoi- Mfamosing Road Cross River State, Nigeria. Elixir International Journal Environ. & Forestry 110 (2017) 48162-48167. ISSN 2229-712X.

Uquetan, U. I, Essoka, P. A, Egor, A. O, Osang, J. E, Bawan A. M; A. (2016) Case Study Of The Effects Of Oil Pollution On Soil Properties And Growth Of Tree Crops In Cross River State, Nigeria; International Journal Of Scientific & Engineering Research, Volume 7, Issue 1, Pp1145-1156, ISSN 2229-551. Http://Www.Ijser.Org.

Uquetan, U. I., Egor, A. O., Osang, J. E., Emeruwa C. (2016) Emperical Study of Wind Energy Potential Calabar, Cross River State. International Journal of Scientific Technology Research. Vol. 4 Issue 10, ISSN 2277-8616 pp 113-121

Uquetan, U. I., Abua, M. A., Essoka, P. A., Osang, J. E., Egor, A. O. (2016) Pedological Study Of Soils Developed From Cretaceous Sediments Of Eze-Aku Shale Group In Yala Local Government Area, Cross River State, Nigeria; International Journal Of Scientific & Engineering Research, Volume 7, Issue 1, Pp1120-1133, ISSN 2229-551

Uquetan, U. I., Igelle, E.I., Egor, A. O. , Inah, E. O, Osang, J. E., And Ekpo, C. M. (2017) Impacts Of Climate Variables On Water Yield In Ujama Okpauku River, Yala Lga, Cross River State, Nigeria. Elixir International Journal Environ. & Forestry 110 (2017) 48168-48173. ISSN 2229-712X. Www.Elixirpublishers.Com.

Ushie, P. O., Ojar, J. U., Egor, A. O., Ohakwere-Eze, M. C., Osang, J. E. Alozie, S. I. (2014) Investigation Of The Efficiency Of Olive Oil As Dielectric Material And Its Economic Value On The Environment Using Its Dielectric Properties;International Journal Of Applied Physics; Www/Ijoarap.Org‎.

Ushie, P. O., Osang, J. E.,, Ojar, J. U, Daniel,T., Ettah, E.B., ; Alozie, S. I. (2014) Determination Of Thermal Conductivity Of Some Materials Using Searle’s Br And Ingen House Experimental Methods Journal of Current Research In Science (Issn 2322-5009) Coden (USA), Vol. 2, No. 1, pp: 63-66 Available at

Uzoho, B. U., Oti, N. D., Ngwuta,C. (2007). Fertility rates under landuse types on soil of similar lithology. Journal of American Soil Science. 3(4):20-29.

West Africa Rice Development Agency (2008). Africa rice trend (2007). WARDA, Cotonou, Benin, pp. 74.

Wilding, L. P., Smeck, N.C. and Hall, G. F. (1983) Pedogenesis and soil taxonomy: Concempts and interactions: Developments in soil science. Elsevier, Amsterdam-Oxford New York.

Williams, B. G. and D. Hoey (1987) The use of electromagnetic induction to detect the spatial variability of the salt and clay contents of soils. Augst. J. Soil Res., 21-27.

Yoshida, S. (1981). Fundamental of Rice Crop science. International Rice Research Institute. Los Bonos, Philipines P. 269.




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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