Isaiah Ufuoma Efenudu

Isaiah Ufuoma EFENUDU Graduate Science Laboratory Technologist (Chemistry) ‖ Soil Chemistry/Fertility ‖ Research Assistant and Laboratory/Field Analyst ‖ Science Data Analyst. OBJECTIVE I am a knowledge-driven person with a passion to Contribute, impact and continue my career with an organization that will utilize my MANAGEMENT, SUPERVISION, and ADMINISTRATIVE skills to benefit mutual growth and success. QUALIFICATION Master’s Degree in Soil Science and Land Management (Soil Chemistry) University of Benin, Benin City, Nigeria 2023 Bachelor Degree in Science, Science Laboratory Technology (Chemistry Techniques) University of Benin, Benin City, Nigeria 2017 SCHOOLS ATTENDED TILL DATE Ph.D Degree in-view in Soil Science and Land Management (Soil Chemistry) University of Benin, Benin City, Nigeria. (2021/2022 Academic Session) Master Degree in Soil Science and Land Management (Soil Chemistry) University of Benin, Benin City, Nigeria 2023 Bachelor in Science, Science Laboratory Technology (Chemistry Techniques) University of Benin, Benin City, Nigeria 2017 Research Experience 2011 – Date Research Assistant and Laboratory/Field Analyst (Intern): Department of Soil Science and Land Management, University of Benin, Benin City, Nigeria Collaborative Research Projects 1. With Prof. (Mrs.) A. O. Bakare (Soil Environmental and Chemistry Research Laboratory, University of Benin, Benin City, Edo State, Nigeria)  Conducted field and laboratory investigations on micronutrient dynamics (Zn, Fe, Mn) in arable soils, focusing on monosaccharide interactions.  Utilized Atomic Absorption Spectrophotometry (AAS) and UV-Vis Spectrophotometry to analyze micronutrient fractions.  Authored and co-authored 5 publications, including "Soil Micronutrient Availability as Influenced by Monosaccharide Distribution" (Bakare et al., 2022) and "Evaluation of Zinc Status in Soils of Edo State" (under review). Isaiah Ufuoma EFENUDU Cv., Pg. 1 of 6 2. With Dr. W. P. Agbai (Soil Physics and Land Conservation Research Laboratory, Niger Delta University)  Assessed heavy metal contamination (Pb, Cd, Hg) in soils of Yenagoa and Southern Ijaw, Bayelsa State.  Applied Universal Soil Loss Equation (USLE) to evaluate soil erodibility indices under different land-use systems.  Co-published 3 papers, including "Land Use Types and Their Influence on Heavy Metals Concentration in Soils" (Agbai & Efenudu, 2022). 3. With Dr. O. E. Jayeola (Soil Chemistry and Fertility Management Research Laboratory, Federal University of Technology, Akure)  Evaluated phosphorus (P) forms (Bray-1, Olsen) in oil palm plantations and arable soils.  Conducted GIS-based spatial analysis to map nutrient distribution in Delta State.  Co-authored "Evaluating Soils Phosphorus Forms and Distribution under Different Land Use Types" (Jayeola et al., 2024). 4. With Prof. O. M. Wangboje (Aquaculture and Ecotoxicity Research Laboratory, University of Benin)  Analyzed heavy metals in fish tissues and water samples from Niger Delta rivers using AAS.  Co-published "Heavy Metals in Frozen Marine Fish Species from Markets in Warri Delta State" (Wangboje et al., 2019). 5. With Dr. M. A. Erhayimwen (Soil Environmental and Chemistry Research Laboratory, University)  Investigated silicon speciation in soils and its role in nutrient availability.  Co-authored "Status and Speciation of Silicon and Its Interaction with Physico-Chemical Properties" (Efenudu et al., 2021). Core Responsibilities  Fieldwork: Designed sampling protocols for soil, plant, and water across 15+ agroecological zones.  Laboratory Analysis: Conducted proximate, mineral (AAS), and microbial evaluations using autoclave, muffle furnace, and UV-Vis spectrophotometry.  Data Analysis: Processed datasets with SPSS, Genstat, and GIS; generated fertility maps. Mentorship: Supervised 20+ undergraduates in thesis writing and laboratory techniques. PUBLICATIONS AND SCHOLARSHIPS 1. Jayeola O.E, Efenudu I. U, and Lawal K.O. (2026). Status of Some Selected Micronutrients of Two Contrasting Wetland Soils in Southern Nigeria. Black Sea Journal of Agriculture Vol. 9 - Issue 1: 51-57. doi:-/bsagriculture-. Bakare A.O and Efenudu I. U (2025). Influence of Phosphorus-Potassium Ratios on Maize Growth, Nutrient Dynamics, and Yield in Contrasting Ecological Zones of Southern Nigeria. Nigerian Journal of Agriculture and Agricultural Technology. Volume 5, Number 4A, December, 2025 Isaiah Ufuoma EFENUDU Cv., Pg. 2 of 7 3. Bakare A.O and Efenudu I. U (2025). Dynamics of Micronutrients in Arable Soils: Implications for Sustainable Agriculture. Nigerian Journal of Agriculture and Agricultural Technology. Volume 5, Number 4A, December, 2025 4. Efenudu I. U and Bakare A.O (2025). The influence of soil dynamics on physical-chemical properties of soils from teak and coconut cultivation areas. Journal of Agriculture, Food and Ecology 3(1) - . https://dergipark.org.tr/tr/pub/jafe 5. Efenudu I. U and Bakare A.O (2025). The dynamics of iron (Fe) and manganese (Mn) oxides and their impact on soil physical and chemical properties in coconut and teak plantations in the University of Benin. Eurasian Journal of Agricultural Research. https://dergipark.org.tr/en/pub/ejar. 6. Jayeola O.E, Efenudu I. U, and Erhayimwen M.A., (2025). Assessment of The Physicochemical Properties on Oil Palm Groves in Songhai, Amukpe Delta State, Nigeria. Journal of Agriculture, Food and Ecology 3(1) -. https://doi.org/10.5281/zenodo-. Bakare A.O, Efenudu I. U and Eegharevba I.P. (2025). Influence of Parent Material on Aluminum Oxide Formation and Distribution in Southwestern Nigerian Soils. Tropical Agrobiodiversity (TRAB) 5(1) -. https:// doi.org/-/trab-. Jayeola O.E., Efenudu I. U, and Dayo-Olagbende G.O (2025). Phosphorus Forms and Distribution in Soils: A Comparative Study of Different Land Use Types. Selcuk Journal of Agriculture and Food Sciences. 39(3), 649-657. doi:-/selcukjafsci-. Bakare A.O, Osemwota I.O., and Efenudu I. U (2025). Variation In Nitrogen and Potassium Ratio in Soils on The Growth and Yield of White Yam (Dioscorea Rotundata Poir). Eurasian Journal of Agricultural Research. Vol: 9, Issue: 2, pp: 168-178. https://dergipark.org.tr/en/pub/ejar. 10. Efenudu, I. U., & Bakare, A. O. (2024). Status and Forms of Calcium in Two Arable Farms: An Assessment of Soil Fertility and Nutrient Availability. Peruvian Journal of Agronomy, 8(3), 192197. https://doi.org/-/pja.v8i-. Efenudu, I. U., & Egharevba, I. (2024). Nutrient status and forms of potassium in farmed soils at University of Benin. Peruvian Journal of Agronomy, 8(2), 102-111. doi.org/-/pja.v8i2.2103 12. Jayeola O.E , Dayo-Olagbende G.O., Oladejo I.A, Efenudu I. U (2024). Evaluating Soils Phosphorus Forms and Distribution under Different Land Use Types. Agricultural Science And Technology, Vol. 16, No 4,. DOI:-/ast-. Erhayimwen M.A, Jayeola O.E and Efenudu I. U (2024). Assessment Of Soil Phosphorus Forms On Oil Palm Plantation In Songhai, Amukpe Delta State, Nigeria. Journal Of Agriculture, Food And Ecology. Isaiah Ufuoma EFENUDU Cv., Pg. 3 of 7 14. A. O. Bakare, I. U. Efenudu and I. P. Egharevba (2022). Soil micronutrient availability as influenced by monosaccharide distribution in cultivated farm land, Nigeria. Pantnagar Journal of Research, Volume 20, Issue 2, Article 5. 15. Agbai, W. P., and Efenudu, U. I. (2022). Land use types and their influence on heavy metals concentration in soils of Yenagoa and Southern Ijaw local government area of Bayelsa State. Bulgarian Journal of Soil Science Agrochemisty and Ecology, 56(3), 3-16. 16. W.P. Agbai1, O.J Tate, and I. U. Efenudu (2022). Erodibility Status of Some Soils in Akoko-Edo Local Government Area of Edo State, Nigeria. Bulgarian Journal of Soil Science 2022 Volume 7. Issue 1. DOI:https://doi.org/10.5281/zenodo-. Agbai, W.P., Efenudu, U.I., Kosuowei, M.T.1 and Ehigiator, E.F. (2022). Determination Of Soil Erodibility Status Under Different Land-Use Types Using Some Erodibility Indices: Case of Yenagoa And Southern Ijaw Local Government Area Of Bayelsa State. Ethiopian Journal of Environmental Studies & Management 15(2): 201 – 214, 2022. DOI: https://ejesm.org/doi/v15i2.6 18. Agbai W.P., Kosuowei M.T., and Efenudu U.I. (2022). The Infiltration Capacity of Soils Under Different Land-Use Systems in Yenagoa and Southern Ijaw Local Government Areas of Bayelsa State. African Journal of Agriculture and Food Science 5(1), 17-28. DOI:-/AJAFSLIAII98M 19. Isaiah Ufuoma Efenudu, Ehi Robert Orhue, Ogochukwu Jennifer Ikeh, Michael Aimiesomon Erhayimwen, and Blessing James (2021) Status and Speciation of Silicon and Its Interaction with Physico-Chemical Properties. Asian Journal of Environment & Ecology 14(2): 1-11, 2021; DOI: 10.9734/AJEE/2021/v14i-. E.M. Isikhuemen, B.O Ogbomwan, and I.U Efenudu (2020) Evaluation of Phytochemical and Mineral Constituents of Piper guineense Schum. And Thonn. and Piper Umbellatum Linn: Implications for Ethnomedicine. European Journal of Medicinal Plants. 31(1): 84-97, 2020. DOI: 10.9734/EJMP/2020/v31i-. O.M. Wangboje, O.T. Ekundayo, E.J. Osasehi, M. Erhayimwen, and U. I. Efenudu (2019) Human risk associated with potential exposure to heavy metals in a gadoid fish species from selected markets in Benin City, Nigeria. Nigeria Tropical Freshwater Biology: 28 (2)13 – 31. DOI: 10.4314/tfb.v28i2.2. 22. O.M Wangboje, O.T Najomoh, and U.I Efenudu (2019). Heavy metals in frozen marine fish species from markets in Warri Delta state Nigeria Equity Journal of Science and Technology 6 (1), 2929 23. Wangboje, oiseoje michael, Atiwe, precious, Erhayimwen, michael, and Efenudu Isaiah (2018) Heavy metals in some fish species from obotie river along the Niger Delta zone of Nigeria, West Africa. International Journal of Applied Science and Research. V0l. - 1 Issue.– 3 Isaiah Ufuoma EFENUDU Cv., Pg. 4 of 7 24. Wangboje, O.M., Umufo, J.R. and Efenudu, U.I. (2018). Heavy metal concentration profile in the myonematic Tissues of selected finfish species and water from a freshwater ecosystem in southwestern Nigeria. Nigerian Journal of Scientific Research: 17 (1). 25. O. M. Wangboje1, P. C. Ekome1 and U. I. Efenudu (2017). Heavy Metal Concentrations in Selected Fishes, and Water from Orogodo River, Agbor, Delta State in Nigeria. Asian Journal of Environment & Ecology 3(1): 1-10. DOI: 10.9734/AJEE/2017/-. P.C. Njoku, E. Nzediegwul, A.A. Ayukl, C. Nzediegwu, I.U. Efenudu and M.A. Erhayimwen (2014). Regimes. Anti-Nutrient composition of Pumpkin Leaf (Telfairia Occidentialis) at Three Temperature. Pakistan Journal of Nutrition: 13 (12). DOI: 10.3923/pjn- TRAINING AND WORKSHOPS ATTENDED WITH DATES • Virtual Assistance Professional | EducCourse (2025) • Remote Office Administrator | EducCourse (2025) • Customer Service Consultant | EducCourse (2025) • Certificate in General Vegetable Production (East-West Seed Knowledge Transfer Foundation in Collaboration with Wageningen University of Research, 2023) • Certificate Diploma on the International Legal Framework on Agriculture, Land Degradation and Soil Protection (InforMEA, United Nations Environmental Law and Conventions Portal, 2023) • Certificate In Agricultural Science – Soil and Plant Nutrition (Alison, 2023) • Certificate in Building Climate Resilience through Ecosystem-based Adaptation Planning (United Nations Institute for Training and Research, 2023). • Certificate In Climate-Smart Agriculture in South-Africa (United Nations Institute for Training and Research, 2023). • Certificate In Introduction to Environmental Governance (United Nations Institute for Training and Research, 2023). • Certificate In International Legal Framework on Freshwater Resources (United Nations Environmental Law and Conventions Portal, 2023) • Certificate In Nature-based Solutions for Disaster and Climate Resilience ((UNEP and PEDRR • • • • • • • • • • with support from the European Union, in collaboration with the SDG Academy and the EdX Platform, 2023). Certificate in Precision Agriculture and Technology (Udemy, 2023) Centre LSD Leadership School, (African Centre for Leadership, Strategy and Development in Partnership with IGNITE STARTUPX, October, 2022 – May 2023) Advance Certificate in Environmental Standards by Centre of Excellence in Sustainable Procurement, Environmental and Social Standards. (UNIBEN in Partnership with World Bank, May 22nd – June 9th, 2023) Concept of Monitoring and Evaluation, (SOS Children’s Village Benin City, 2021) Life Management and Technical skills (Genius hub, Roman’s Page Global in Partnership with SOS Children's Village Organization. 2020). Principles of Occupational Health and Safety Management (Alison 2020). Environmental Management System (Alison, 2020). School of Disciples, (Christ The Redeemers Ministries, 2016) Diploma in Theology (Redeem Christian Bible College, 2016)s Microsoft in Computer Applications, (Aiselaw Global Computer Institute, 2007) Isaiah Ufuoma EFENUDU Cv., Pg. 5 of 7 AWARDS AND PROFESSIONAL AFFILIATION • Member, Soil Science Society of Nigeria, (SSSN) • Member, Nigerian Institute of Science Laboratory Technology, (NISLT) • Member, International Union of Soil Sciences, (IUSN) • Member, Chemical Society of Nigeria, (CSN) 2019 - Date 2019 - Date 2018 - Date 2017 – Date Research Skills  Laboratory Techniques: UV-Vis Spectrophotometry, AAS, microbial assays, proximate analysis.  Data Tools: SPSS, Genstat, Microsoft Excel, KOBOTOOL for field data collection.  Writing & Communication: Proficient in APA/MLA; 16+ peer-reviewed articles; technical report drafting.  Teaching: Curriculum development, student mentorship, WAEC examination preparation. ADHOC DUTIES/VOLUNTEERISM  April 2021: Sanitation Personnel at Edo National Sport Festival.  April 2021: Monitoring and Evaluation Personnel for SOS Children’s Village Organization (Covid-19 Palliative Distribution).  January 2021: Edo State Covid-19 Awareness Campaign (Rural/Urban Communities).  September 2020: Assistant Presiding Officer II (APO II) for INEC Nigeria Elections. Manuscripts Under Review 1. Bakare A.O, Efenudu I. U and Eegharevba I.P. (2026). Manganese Oxide Distribution Dynamics and Soil Fertility Implications Across Four Distinct Parent Materials in Southwestern Nigeria. The Journal of Arid Agriculture 2. Bakare A.O and Efenudu I. U (2026). Magnesium Dynamics in Soils under Yam and Cassava Cropping Systems in Southern Nigeria. The Journal of Arid Agriculture 3. Bakare, A. O, Efenudu, I. U, and Osemwota I. O. (2026). Parent Material Influence on Soil Properties and Sulfur Cycling: Implications for Agricultural Management in Southern Nigerian Hydromorphic Soils. The Federal University Dutsin-Ma Journal of Agriculture and Agricultural Technology (FUDMA-JAAT) 4. Bakare A.O, Osemwota I.O., and Efenudu I. U (2026). Iron and Manganese Dynamics in Hydromorphic Soils of Southern Nigeria: Assessing Total Pools, Bioavailability, and Management Implications. The Federal University Dutsin-Ma Journal of Agriculture and Agricultural Technology (FUDMA-JAAT). 5. Bakare A.O, Osemwota I.O., and Efenudu I. U (2026). Spatial Dynamics of Iron Fractions and Their Relationship with Soil Physico-Chemical Properties in Tropical Agroecosystems. Kashere Journal of Geography and Sustainable Environment Isaiah Ufuoma EFENUDU Cv., Pg. 6 of 7 6. Bakare A.O, Eegharevba I.P., and Efenudu I. U (2026). Comparative Study of Iron Oxide Distribution in Soils Derived from Diverse Parent Materials in Southwestern Nigeria. Kashere Journal of Geography and Sustainable Environment 7. Bakare A.O, Osemwota I.O., and Efenudu I. U (2026). Influence of Parent Materials and Soil Properties on Zn Distribution and Bioavailability in Tropical Nigerian Soils. Journal of Agriculture, Forestry and Fisheries (JAFF) 8. Bakare, A. O and Efenudu, I. U, (2025). Evaluation of Zinc Status in Some Soils of Edo State Nigeria. University of Benin Journal of Science and Technology. 9. Obayuwana H. O, Eriyamremu, G. E., and Efenudu, I. U. (2026). Characterization of Cassava Mill Effluent Under Different Environmental Conditions and Its Suitability as a Biostimulant for Soil Remediation. Duste journal of pure and applied sciences 10. Obayuwana H. O, Eriyamremu, G. E., And Efenudu, I. U. (2026). Impact of Cassava Mill Effluent Amendment on Physicochemical Properties of Hydrocarbon-Contaminated Soil Over Time. Nigerian Journal of Science and Environment (NJSE) 11. Efenudu I. U, Jayeola O.E, and Erhayimwen M.A, (2025). Characterization And Distribution of Potassium in Songhai Amukpe Oil Palm Soils, Nigeria. COMU Journal of Agriculture Faculty 12. Efenudu I. U, Erhayimwen M.A and Jayeola O.E (2025). Distribution of Exchangeable Cations in Songahi Amukpe Oil Palm Grove, Delta State, Nigeria. Journal of Agricultural Science and Technology 13. Jayeola O. E., and Efenudu I. U (2025). Land Use and Vegetation Effects on Soil Physicochemical Properties and Nitrogen Mineralization in Tropical Agroecosystems. Malaysian Journal of Sustainable Agriculture Isaiah Ufuoma EFENUDU Cv., Pg. 7 of 7 Isaiah Ufuoma Efenudu University of Benin, Nigeria Soil and Environmental Chemistry Citations h-index i10-index All Since 2021 63 4 2 55 4 1 TITLE Evaluation of Phytochemical and Mineral Constituents of Piper guineense Schum. And Thonn. and Piper Umbellatum Linn: Implications for Ethnomedicine. CITED BY YEAR 23 2020 12 2017 8 2014 E.M. Isikhuemen, B.O Ogbomwan, and I.U Efenudu European Journal of Medicinal Plants. 31 (1), 84-97 Heavy Metal Concentrations in Selected Fishes, and Water from Orogodo River, Agbor, Delta State in Nigeria. O. M. Wangboje1, P. C. Ekome1 and U. I. Efenudu Asian Journal of Environment & Ecology 3 (1), 1-10 Anti-nutrient composition of pumpkin leaf (Telfiaria occidentalis) at three temperature regimes PC Njoku, E Nzediegwu, AA Ayuk, C Nzediegwu, IU Efenudu, ... Pakistan Journal of Nutrition 13 (12), 678-682 The Infiltration Capacity of Soils Under Different Land-Use Systems in Yenagoa and Southern Ijaw Local Government Areas of Bayelsa State. 6 * 2022 Agbai, W.P., Kosuowei, M.T., and Efenudu, U.I. African Journal of Agriculture and Food 5 (1), 17-28 Land use types and their influence on heavy metals concentration in soils of Yenagoa and Southern Ijaw local government area of Bayelsa State 3 2022 3 2019 W Agbai, U Efenudu Bulgarian Journal of Soil Science, Agrochemistry and Ecology 56 (3), 3-16 Human risk associated with potential exposure to heavy metals in a Gadoid fish species from selected markets in Benin City, Nigeria OM Wangboje, OT Ekundayo, EJ Osasehi, M Erhayimwen, UI Efenudu Tropical Freshwater Biology 28 (2), 13-31 Erodibility Status of Some Soils in Akoko-Edo Local Government Area of Edo State, Nigeria. 2 * 2022 W.P. Agbai1, O.J Tate, I. U. Efenudu Bulgarian Journal of Soil Science 7 (1) Evaluating Soils Phosphorus Forms and Distribution under Different Land Use Types 1 2024 1 2022 1 2022 1 2021 1 2019 1 2018 . Jayeola, O.E., Dayo-Olagbende, G.O., Oladejo, I.A., Efenudu, I.U Agricultural Science And Technology 16 (4) DETERMINATION OF SOIL ERODIBILITY STATUS UNDER DIFFERENT LAND-USE TYPES USING SOME ERODIBILITY INDICES: A CASE OF YENAGOA AND SOUTHERN IJAW LOCAL GOVERNMENT AREA OF BAYELSA STATE WP Agbai, UI EFENUDU, MT KOSUOWEI, EF Ehigiator Ethiopian Journal of Environmental Studies & Management 15 (2), 201-214 Soil micronutrient availability as influenced by monosaccharide distribution in cultivated farm land, Nigeria. AO Bakare, IU Efenudu, IP Egharevba Status and Speciation of Silicon and Its Interaction with Physico-Chemical Properties IU Efenudu, ER Orhue, OJ Ikeh, MA Erhayimwen, B James Asian Journal of Environment & Ecology 14 (2), 1-11 Heavy metals in frozen marine fish species from markets in Warri Delta state Nigeria OM Wangboje, OT Najomoh, UI Efenudu Equity Journal of Science and Technology 6 (1), 29-29 Heavy metal concentration profile in the Myonematic tissues of selected finfish species and water from a freshwater ecosystem in south western Nigeria OM Wangboje, UI EFENUDU, UMUFO, JR Nigerian journal of scientific research 17 (1), 79-90 Status of Some Selected Micronutrients of Two Contrasting Wetland Soils in Southern Nigeria OE Jayeola, İU Efenudu, KO Lawal Black Sea Journal of Agriculture 9 (1), 51-57 2026 TITLE Variation in Nitrogen and Potassium Ratio in Soils on The Growth and Yield of White Yam (Dioscorea rotundata POIR) CITED BY YEAR 2025 AO Bakare, IO Osemwota, IU Efenudu Eurasian Journal of Agricultural Research 9 (2), 168-178 Phosphorus Forms and Distribution in Soils: A Comparative Study of Different Land Use Types 2025 İU Efenudu, OE Jayeola, O Dayo-olagbende Selcuk Journal of Agriculture and Food Sciences 39 (3), 649-657 DYNAMICS OF MICRONUTRIENTS IN ARABLE SOILS: IMPLICATIONS FOR SUSTAINABLE AGRICULTURE 2025 AO Bakare, IU Efenudu Nigerian Journal of Agriculture and Agricultural Technology 5 (4A), 1-9 INFLUENCE OF PHOSPHORUS-POTASSIUM RATIOS ON MAIZE GROWTH, NUTRIENT DYNAMICS, AND YIELD IN CONTRASTING ECOLOGICAL ZONES OF SOUTHERN NIGERIA 2025 AO Bakare, IU Efenudu Nigerian Journal of Agriculture and Agricultural Technology 5 (4A), 10-16 The dynamics of iron (Fe) and manganese (Mn) oxides and their impact on soil physical and chemical properties in coconut and teak plantations in the University of Benin 2025 EIUB A O Eurasian Journal of Agricultural Research 9 (Issue: 2,), pp: 138-149 Influence of Parent Material on Aluminum Oxide Formation and Distribution in Southwestern Nigerian Soils. 2025 Bakare A.O, Efenudu I. U, and Eegharevba I.P. Tropical Agrobiodiversity (TRAB) 5 ((1)), 62-67 Assessment of The Physicochemical Properties on Oil Palm Groves in Songhai, Amukpe Delta State, Nigeria. 2025 Jayeola O.E, Efenudu I. U, and Erhayimwen M.A. Journal of Agriculture, Food and Ecology 3 ((1)), 15–24 The influence of soil dynamics on physical-chemical properties of soils from teak and coconut cultivation areas. 2025 Efenudu I. U and Bakare, A.O Journal of Agriculture, Food and Ecology 3 ((1)), 7–14 Status and Forms of Calcium in Two Arable Farms: An Assessment of Soil Fertility and Nutrient Availability 2024 IU Efenudu, Bakare A. O Peruvian Journal of Agronomy 8 (3), 192-197 ASSESSMENT OF SOIL PHOSPHORUS FORMS ON OIL PALM PLANTATION IN SONGHAI, AMUKPE DELTA STATE, NIGERIA. 2024 AM Erhayimwen, OE Jayeola, İ Efenudu Journal of Agriculture, Food and Ecology 2 (2), 15-20 Nutrient status and forms of potassium in farmed soils at University of Benin. 2024 Efenudu I., & Egharevba I. Peruvian Journal of Agronomy 8 (2), 102-111 Heavy metals in some fish species from obotie river along the Niger Delta Zone of Nigeria, West Africa. Wangboje oiseoje michael, Atiwe precious, Erhayimwen michael, and Efenudu Isaiah International Journal of Applied Science and Research. 1 (3) 2018