UTHMAN Azarel Caldbak Oladotun

Research Fellow & Soil Scientist
200372, Ibadan, NG.

About

A distinguished Soil Scientist and Agronomist with over 20 years of progressive experience in sustainable agricultural research and development, dedicated to enhancing food security and farmer livelihoods in sub-Saharan Africa. Expert in integrated soil fertility management, climate-smart agriculture, and innovative composting technologies, evidenced by 17+ peer-reviewed publications and leadership in significant grant-funded projects. Committed to translating scientific knowledge into scalable, evidence-based solutions for agroecosystem resilience and crop productivity.

Work

Obafemi Awolowo University
|

Research Fellow I

Ibadan, Oyo, Nigeria

Summary

Leads advanced research initiatives in soil science and agronomy, focusing on sustainable agricultural practices and nutrient management within the Institute of Agricultural Research & Training.

Highlights

Led and executed over 17 peer-reviewed research projects focusing on soil fertility, nutrient cycling, and climate-smart agriculture, significantly contributing to sustainable agricultural transformation.

Secured and managed research grants from organizations like Agricultural Revolution for Africa (AGRA) and European Horizon 2020, promoting integrated soil fertility management and soil health.

Pioneered the design and field-testing of a manually operated organic/inorganic fertilizer applicator, improving input efficiency and reducing labor for smallholder farmers.

Developed and disseminated an accelerated composting technique for cassava-based compost, enhancing soil nutrient profiles and supporting zero-waste production systems.

Provided expert consultancy and resource person services on organic crop production and soil fertility management to agricultural development authorities and extension agents, impacting local farming practices.

Obafemi Awolowo University
|

Research Fellow II

Ibadan, Oyo, Nigeria

Summary

Conducted specialized research in soil fertility and agricultural microbiology, contributing to academic publications and practical agricultural solutions.

Highlights

Co-authored multiple peer-reviewed journal articles on soil microbial activities and nutrient availability under various soil management systems, enriching the academic discourse.

Participated in the implementation of research grants, analyzing soil chemical and biological properties to inform sustainable agricultural practices.

Contributed to the development of integrated plant residue management strategies aimed at improving soil properties and maize performance in diverse agroecologies.

Collaborated with interdisciplinary teams on projects evaluating land use effects on soil properties, providing critical data for land use planning and policy recommendations.

Mentored junior researchers and students in laboratory techniques and field data collection, fostering skill development within the research unit.

Obafemi Awolowo University
|

Junior Research Fellow

Ibadan, Oyo, Nigeria

Summary

Initiated a research career focusing on fundamental soil science principles and their application to enhance agricultural productivity and sustainability.

Highlights

Assisted in primary research data collection and analysis for projects investigating the impact of tillage and poultry manure on upland rice growth in South-West Nigeria.

Supported studies on nitrogen release from animal manure and its effects on microbial community structure and maize yield, building foundational expertise.

Contributed to the initial phases of research grant applications and project planning, gaining exposure to research funding mechanisms.

Participated in field experiments and laboratory analyses, ensuring adherence to scientific protocols and data integrity.

Engaged with the Nigeria Soil Health Consortium as a Technical Support Committee member, contributing to regional soil health initiatives.

West African Examination Council (WAEC)
|

Examiner in Agricultural Science

Yaba, Lagos, Nigeria

Summary

Assessed and graded agricultural science examination scripts for secondary school students, ensuring fair and accurate evaluation.

Highlights

Evaluated a high volume of Agricultural Science examination scripts annually for WAEC, maintaining strict grading standards.

Applied comprehensive knowledge of the agricultural science curriculum to provide consistent and equitable student assessments.

Contributed to the integrity of national examinations by adhering to established guidelines and reporting procedures.

National Examination Council (NECO)
|

Examiner in Agricultural Science

Minna, Niger, Nigeria

Summary

Assessed and graded agricultural science examination scripts for secondary school students, ensuring fair and accurate evaluation.

Highlights

Graded numerous Agricultural Science examination papers for NECO, ensuring accuracy and fairness in student evaluation.

Utilized in-depth subject matter expertise to provide consistent and standardized assessment outcomes.

Maintained confidentiality and integrity throughout the examination marking process.

Federal University of Agriculture, Abeokuta
|

Practical Demonstrator in Soil Science and Land Management

Abeokuta, Ogun, Nigeria

Summary

Facilitated practical laboratory and field sessions for students, enhancing their understanding of soil science and land management principles.

Highlights

Guided undergraduate students through hands-on experiments in soil analysis, classification, and management techniques, improving practical skills.

Prepared and maintained laboratory equipment and field plots for instructional purposes, ensuring a conducive learning environment.

Provided one-on-one support and clarification to students on complex scientific concepts, contributing to academic success.

Assisted faculty in grading practical assignments and assessing student performance, supporting the educational process.

Bodako Farms
|

Consultant / Sales Representative

Odeda, Ogun, Nigeria

Summary

Provided agricultural consulting services and managed sales activities for farm products, contributing to business growth and farmer support.

Highlights

Advised farmers on optimal agricultural practices, including soil management and crop cultivation, improving yield potential.

Developed and implemented sales strategies for farm produce, contributing to revenue generation for Bodako Farms.

Built and maintained strong relationships with clients and suppliers, ensuring smooth operations and customer satisfaction.

Identified market opportunities and customer needs, informing product development and sales efforts.

Government Science School
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National Youth Service Corps (Teaching)

Orimekpang, Cross River, Nigeria

Summary

Taught science subjects to secondary school students, contributing to their academic development and fostering a positive learning environment.

Highlights

Delivered engaging lessons in science subjects to secondary school students, enhancing their understanding and academic performance.

Developed and implemented effective teaching methodologies to cater to diverse learning styles.

Organized extracurricular science activities, promoting student interest and participation in scientific inquiry.

Provided mentorship and guidance to students, supporting their personal and academic growth.

FUNAAB FARMS (TEFEMAC)
|

Industrial Attachment

Abeokuta, Ogun, Nigeria

Summary

Gained practical experience in farm operations and agricultural management, applying academic knowledge to real-world settings.

Highlights

Participated actively in various farm operations, including crop planting, cultivation, and harvesting, gaining hands-on experience.

Assisted in the implementation of agricultural best practices, contributing to efficient farm management.

Learned about farm machinery operation and maintenance, enhancing practical technical skills.

Contributed to data collection for farm productivity analysis, supporting operational decision-making.

Volunteer

Divine Height Bible Church
|

Member, Intercessory Group

Abeokuta, Ogun, Nigeria

Summary

Actively participated in community and spiritual support initiatives.

Highlights

Contributed to community outreach and support programs, fostering local engagement.

Provided spiritual guidance and support to community members through intercessory activities.

Education

Federal University of Agriculture, Abeokuta
Abeokuta, Ogun, Nigeria

Ph.D.

Soil Fertility

Federal University of Agriculture, Abeokuta
Abeokuta, Ogun, Nigeria

M. Agric.

Soil Fertility/Microbiology

Usmanu Dan-fodio University, Sokoto State
Sokoto, Sokoto, Nigeria

Postgraduate Diploma

Education

Federal University of Agriculture, Abeokuta
Abeokuta, Ogun, Nigeria

B. Agric.

Agricultural Science/Soil Science

Awards

Certificate of Honour

Awarded By

Council for Scientific and Industrial Research, Ghana

Recognized for significant contributions to scientific and industrial research.

OCP Young Scholar Sponsorship

Awarded By

Nigeria Institute of Soil Science (NISS)

Awarded sponsorship to support young scholars in soil science research and development.

Lagos State Government Scholarship Award

Awarded By

Lagos State Government

Received a scholarship for an indigene student attending university, supporting academic pursuits.

Lagos State Government Scholarship Award

Awarded By

Lagos State Government

Received a scholarship for an indigene student attending university, supporting academic pursuits.

Lagos State Government Scholarship Award

Awarded By

Lagos State Government

Received a scholarship for an indigene student attending university, supporting academic pursuits.

Lagos State Government Scholarship Award

Awarded By

Lagos State Government

Received a scholarship for an indigene student attending university, supporting academic pursuits.

Publications

Suitability and Productivity Assessment for Key Crops Cultivation on Basement Complex Soil Formation at Abeokuta, Nigeria.

Published by

FUW Trends in Science and Technology Journal

Summary

Co-authored research evaluating soil suitability for key crops on basement complex soil, providing insights for optimized cultivation.

Integrated Nutrient Management for Sustainable Soil and Crop Productivity.

Published by

European Journal of Agriculture and Forestry Research

Summary

Co-authored publication on integrated nutrient management strategies for sustainable soil and crop productivity.

Evaluation of Critical Levels of P in some Soils of South-West Nigeria, For Maize Production.

Published by

Ife Journal of Science

Summary

Co-authored research evaluating critical phosphorus levels in South-West Nigerian soils for maize production.

Towards Pineapple Production in Nigeria: A Land Suitability Evaluation Approach Using Parametric Model.

Published by

Applied Tropical Agriculture

Summary

Co-authored study on land suitability evaluation for pineapple production in Nigeria using a parametric model.

Nitrogen Fractions, Microbial Population and Maize Yield as Affected by Type of Animal Manure Applied in Agricultural and Wetland Soils at Abeokuta and Bodako Farms, Ogun State, Nigeria.

Published by

Journal of Applied Science and Environmental Management

Summary

Authored research investigating the effects of various animal manures on nitrogen fractions, microbial population, and maize yield in agricultural and wetland soils.

Characterization of Biochar and Compost Produced from Different Plant Materials and its Swine-based Compost for Soil Nutrient Release, Global Journal of Agricultural Research

Published by

Global Journal of Agricultural Research

Summary

Authored publication characterizing biochar and compost from plant materials and swine-based compost for soil nutrient release.

Evaluation of Soil Suitability for Tomato and Pepper Sufficiency Production in Odeda Area of Ogun State, Nigeria.

Published by

Agriculture, Food, and Natural Resources Journal

Summary

Co-authored research evaluating soil suitability for tomato and pepper production in Odeda area, Ogun State.

Comparative Assessment of Raw and Peroxide-Aeration Recycled Cassava Effluent on Soil Heavy Metal Content.

Published by

Environmental Science and Engineering (Proceedings of the 10th International Conference on Energy Engineering and Environmental Engineering)

Summary

Co-authored conference proceeding assessing the impact of cassava effluent on soil heavy metal content.

Integrated Plant Residue Management for Soil Properties Improvement and Maize (Zea mays L.) Performance in Two Agroecologies of Southwest Nigeria.

Published by

Federal University of Agriculture, Abeokuta (Unpublished Ph.D. Thesis)

Summary

Ph.D. thesis on integrated plant residue management for improving soil properties and maize performance in Southwest Nigeria.

Changes in Chemical and Biological Properties during Co-composting of Swine Dung and Different Plant Materials.

Published by

Eurasian Journal of Soil Science

Summary

Co-authored research on the chemical and biological changes during co-composting of swine dung and plant materials.

Development of a Manually Operated Organic and Inorganic Fertilizer Applicator for Smallholder Farmers.

Published by

Research in Agricultural Engineering

Summary

Co-authored publication on the development of a manually operated fertilizer applicator for smallholder farmers.

Impacts of Glyphosate on Plant Growth Promoting Abilities of Rhizobacteria Isolated from Agricultural Soil.

Published by

Ife Journal of Agriculture

Summary

Co-authored research on the impacts of glyphosate on plant growth-promoting rhizobacteria in agricultural soil.

Effects of Lima Beans (phaseolus Lunatus) Production on Some Enzymatic Activities and Soil Biological Properties.

Published by

Proceedings of the 3rd Annual Conference of the Society for Underutilized Legume (SUL)

Summary

Co-authored conference proceeding on the effects of lima bean production on soil enzymatic activities and biological properties.

Physical, Chemical and Biological Properties of an Accelerated Cassava Based Compost Prepared Using Different Ratios of Cassava Peels and Poultry Manure.

Published by

Communications in Soil Science and Plant Analysis

Summary

Co-authored research on the properties of accelerated cassava-based compost prepared with cassava peels and poultry manure.

Glyphosate Degradation by Two Plant Growth Promoting Bacteria (PGPB) Isolated from Rhizosphere of Maize.

Published by

Microbiology Research Journal International

Summary

Co-authored research on glyphosate degradation by plant growth-promoting bacteria isolated from maize rhizosphere.

Yield and Yield Components of Quality Protein Maize (Zea mays L.) under a Typic Plinthustalf.

Published by

Proceedings of the 42nd Annual Conference of the Soil Science Society of Nigeria (SSSN)

Summary

Co-authored conference proceeding on maize yield under specific soil conditions.

Assessment of the Physical and Chemical Properties of Three Contrasting Soils under Different Land Use Systems.

Published by

Current Research in Agricultural Sciences

Summary

Co-authored research assessing physical and chemical properties of soils under different land use systems.

Soil Microbial Activities and its Relationship with Soil Chemical Properties under Selected Soil Management Systems.

Published by

Journal of Agriculture, Forestry and Social Science

Summary

Co-authored research on soil microbial activities and their relationship with soil chemical properties under various management systems.

Effect of Land Use on some Soil Chemical Properties and P Fractions in South-Western Nigeria.

Published by

Journal of Agriculture, Forestry and Social Science

Summary

Co-authored research on the effect of land use on soil chemical properties and phosphorus fractions in South-Western Nigeria.

Effect of Nitrogen Release from Animal Manure on Microbial Community Structure, Maize (Zea mays, L) Growth and Yield in Three Soils.

Published by

Federal University of Agriculture, Abeokuta (Unpublished M. Agric. Dissertation)

Summary

M. Agric. dissertation on the effect of nitrogen release from animal manure on microbial community structure and maize performance.

Growth of Upland Rice as affected by Tillage and Poultry manure application on an Alfisol in South-West Nigeria.

Published by

Federal University of Agriculture, Abeokuta (Unpublished B. Agric. Project)

Summary

B. Agric. project on upland rice growth as affected by tillage and poultry manure application in South-West Nigeria.

Languages

English
Yoruba

Skills

Research & Development

Experimental Design, Data Analysis, Scientific Writing, Peer Review, Grant Writing, Literature Review, Methodology Development.

Soil Science

Soil Fertility Management, Soil Health, Nutrient Cycling, Soil Microbiology, Soil Chemistry, Land Use Planning, Agroecology, Soil Remediation.

Agricultural Practices

Sustainable Agriculture, Climate-Smart Agriculture, Crop Production, Integrated Nutrient Management, Composting, Biochar Application, Fertilizer Application, Precision Agriculture.

Extension & Outreach

Farmer Training, Stakeholder Engagement, Technology Transfer, Agricultural Extension, Community Development, Workshop Facilitation.

Leadership & Mentorship

Team Leadership, Project Management, Student Supervision, Curriculum Development, Cross-functional Collaboration.

Projects

Compost Fortification for Effective Soil Fertility Management and Maize Performance

Summary

Ongoing research exploring methods of compost fortification to enhance its effectiveness in soil fertility management and improve maize performance.

Effects of Tillage and Soil Amendments on Growth of Sweet Potatoes and Maize Intercrop Performance

Summary

Ongoing research investigating the impact of different tillage practices and soil amendments on the growth and yield of sweet potatoes and maize in intercropping systems.

Response of Sweet Potatoes and Cowpea Intercrop Performance on Residual Soil of Inorganic and Organic Fertilizers

Summary

Ongoing research assessing the residual effects of inorganic and organic fertilizers on the intercrop performance of sweet potatoes and cowpea.

Integrated Residue Management and Improvement of Soil Fertility in Tropical Soils

Summary

Ongoing research focused on developing and testing integrated residue management strategies to enhance soil fertility in tropical agro-ecosystems.

Soil Test Interpretation and Fertilizer Recommendation through Calibration Studies for Soils of Varying pH

Summary

Ongoing research conducting calibration studies to improve soil test interpretation and develop precise fertilizer recommendations for soils with diverse pH levels.

Soil for Africa Field Campaign

Summary

Research executed as collaborating scientist focusing on soil health initiatives across Africa.

Accelerated Composting Technique for Cassava-based Compost Production

Summary

Developed and implemented an accelerated composting technique for cassava-based compost, reducing production time to four weeks.

Manual Fertilizer Applicator Design and Fabrication

Summary

Part of the team that designed and fabricated a manual applicator for granular and pulverized organic manure.

Promotion of wider uptake of Integrated Soil Fertility Management

Summary

Research project aimed at impacting rural livelihoods through improved soil health under the Nigeria Soil Health Consortium (Southern node).