Joshua Olanrewaju Olaoye

@unilorin.edu.ng

Professor, Faculty of Engineering and Technology
Lecturer, Faculty of Engineering and Technology
University of Ilorin, Ilorin, Nigeria

Joshua Olanrewaju Olaoye


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https://researchid.co/joolaoye
Joshua Olanrewaju Olaoye had B. Eng. degree in Agricultural Engineering from University of Ilorin in 1990. He had his M. Eng. and Ph.D. in Agricultural Engineering from the same University in 1995 and 2004 respectively. He joined the services of the University of Ilorin, Ilorin in 1998 as an academic and research staff in the Department of Agricultural and Biosystems Engineering of the University of Ilorin, Ilorin, Nigeria. Olaoye rose through the ranks to become Professor of Agricultural and Biosystems Engineering on October 1, 2017. His research activities are in the areas of Farm Power and Machinery, Food Engineering, Bio-energy and Post Harvest Engineering.
Olaoye registered with COREN in 2005 as a registered Engineer, Nigeria. He is also a member of many Local, National and International Associations and Professional bodies. He is a Fellow of Nigerian Institution of Agricultural Engineers (NIAE); Member, Nigerian Society of Engineers (NSE), Member American Society of Agricultural

EDUCATION

University of Ilorin, Faculty of Engineering and Technology, Department of Agricultural and Biosystems Engineering, Ilorin, Kwara, Nigeria
2000-06-03 to 2004-12-22 | Engineering (Agricultural Engineering),
1992-06-30 to 1995-05-08 | M. Engineering (Agricultural Engineering),
1985-10-18 to 1990-08-22 | B. Engineering (Agricultural Engineering)

RESEARCH, TEACHING, or OTHER INTERESTS

Bioengineering, Agricultural and Biological Sciences, Renewable Energy, Sustainability and the Environment, Food Science
30

Scopus Publications

1174

Scholar Citations

19

Scholar h-index

35

Scholar i10-index

Scopus Publications

  • Development and Statistical Evaluation of Fortified Soil Nutrient Formulation from Sugarcane Leaves Biomass for Soil Amelioration
    Catherine Ejieji, Elijah Alhassan, Joshua Olanrewaju Olaoye, Musliu Olushola Sunmonu, Qudus Babatunde Adeyi
    Yuzuncu Yil University Journal of Agricultural Sciences, 2026
    Soil nutrient management is vital to sustainable farming practices and productivity. This study focused on pelletizing sugar cane leaves into granular fortified organic fertilizer for soil amelioration. To achieve this, a hammer mill incorporated with a cyclone was used for size reduction of substrate biomass. This was pelletized and characterized for its proximate and mineral compositions to confirm its potency for enhancing soil quality. Three sample sizes, namely coarse, medium, and fine, were formulated with the addition of NPK (20:10:10) fertilizer using liquid starch as a binder. A pelletizer having a ring die of diameter 6 mm was used for sample production. Proximate analysis established the elemental nutrient composition of the bio-based fertilizer, including nitrogen, potassium, calcium, magnesium, phosphorus, carbohydrate, protein, moisture content, crude fibre, fat, and ash. Additionally, sample durability was measured using a tumbling apparatus. At a confidence level of P<0.05, experimental results revealed that all nutrients except nitrogen were present in significant quantities, with nitrogen being less abundant in the plant leaves. Furthermore, particle size influence nutrient composition, with potassium displaying the most pronounced differences. The durability results revealed that the medium sized substrate has the highest durability index (DI) of 76.35% at 10.89 mc, followed by the fine particle size, 65.78% at 11.21 mc and coarse having 56.72% at 11.47 mc. Conclusively, these findings highlight the potential of sugar cane leaves as a fortified biomass organic fertilizer. Addressing the nitrogen deficiency identified in the substrate is crucial, supporting a mixed soil ameliorating protocol for robust soil quality.
  • Transformative trends: commercial platforms revolutionizing rice farming in Nigeria's agricultural value chain
    Mayowa Saheed Sanusi, Odewole Michael Mayokun, Musliu Olushola Sunmonu, Suleiman Yerima, Dare Mobolaji, et al.
    International Journal of Agricultural Sustainability, 2025
  • RSM-based co-gasification of palm oil decanter cake and sugarcane bagasse: Syngas production and biochar characteristics
    Kunmi Joshua Abioye, Noorfidza Yub Harun, Mohammad Yusuf, Hesam Kamyab, Joshua O. Ighalo, et al.
    Biomass and Bioenergy, 2024
  • Tractor acquisition and agricultural performance among Nigerian farmers: Evidence from Co-integration Modeling technique
    E.A. Alhassan, J.A. Asaleye, J.K. Biniyat, T.R. Alhassan, J.O. Olaoye
    Heliyon, 2024
  • DYNAMIC BALANCING AND OPTIMUM PERFORMANCE OF A MELON DEPODDING AND WASHING MACHINE
    A. A. Adebayo, M. O. Olaoye, J. O. Olaoye
    2024 Asabe Annual International Meeting, 2024
  • THE EFFECTS OF SPINDLE TYPES AND KNEADING SPEED ON THE YIELD OF SHEA BUTTER IN AN AUTOMATED KNEADING MACHINE
    Israel Peter Duniya, Mary Olayinka Olaoye, J. O. Olaoye
    2024 Asabe Annual International Meeting, 2024
  • Statistical modelling of a tractor tractive performance during ploughing operation on a tropical Alfisol
    Elijah Aina Alhassan, Joshua Olanrewaju Olaoye, Adewale Folaranmi Lukman, Timothy Adesoye Adekanye, Oluwaseyi Matthew Abioye
    Open Agriculture, 2024
    Tractor is the most prominent off-road agricultural machinery that is significant to the global food security. The tractive modelling of tyre–soil interaction and agricultural implement dynamics is a complex phenomenon that require holistic approach. Terramechanics techniques such as empirical, semi-empirical, analytical, and numerical methods such as finite element models and discrete element models have gained traction in tractive performance studies. Some of these approaches are premised on large arrays of variables for modelling tractive performance based on the soil–tyre and tools interactions. In this study, soft computing in R software domain was used to model the tractor tractive performance during ploughing operations on a tropical Alfisol. The research farm at the National Centre for Agricultural Mechanization was used for the field experiment. The experimental design was a nested-factorial under a Randomized Complete Block Design having three replications. The input factors were tractor power size, T, (60, 65, and 70 hp); tyre inflation pressure, P, (83, 124, and 165 kPa); implement configuration, I, (2 and 3 bottoms disc plough); and operational speed, S, (6.31, 7.90, 9.47, 11.05, and 12.63 km/h). Standard procedures were followed to obtain the measured parameters in the field, which were statistically analysed. Correlation analysis and analysis of variance of the measured parameters at 5% significance level were established. Multiple linear regression was used to develop the model, validated using the 10-fold cross-validation method. The results revealed that the evaluated variables have a range of 1.56–7.79 kN, 5.15–27.20%, 9.10–32.00 cm, 4.50–13.94%, 1.31–1.67 g/cm3, 95.89–207.78 kPa, and 98.67–295.56 for draught, wheel slip, depth of cut, moisture content, bulk density, cone index (CI), and shear stress, respectively. A positive correlation exists between the towing force (TF) and the measured variables except for the shear stress and CI. The final developed model has seven variables for predicting TF with a 6.5% error and an average of 0.4735 cross validation root mean square error. The model quality of fit achieved an R Adj 2 = 0.8754 {R}_{\\text{Adj}}^{2}=0.8754 which satisfactorily described the response variable. The study provides insights into tractive dynamic systems modelling of machine, tractive medium (soil), and agricultural tools anchored on soft computing approach. Its adoption will assist in quality ploughing operation integrating the variables established in the model.
  • Optimization of process conditions for moisture ratio and effective moisture diffusivity of tomato during convective hot-air drying using response surface methodology
    Obafemi Ibitayo Obajemihi, Joshua Olanrewaju Olaoye, Jun‐Hu Cheng, John Olusegun Ojediran, Da‐Wen Sun
    Journal of Food Processing and Preservation, 2021
  • Modes of Entry as Predictors of Academic Performance of Engineering Students in a Nigerian University
    John A. Olorunmaiye, Olalekan J. Ogunniyi, Taiwo Yahaya, Joshua O. Olaoye, Ademola A. Ajayi-Banji
    2020 Ifees World Engineering Education Forum Global Engineering Deans Council Weef Gedc 2020, 2020
    The four modes of entry into Faculties of Engineering and Technology in Nigerian universities are: passing the Unified Tertiary Matriculation Examination (UTME) to gain admission into the first year of a five-year engineering degree programme; passing through a one year Remedial programme before coming in as first year students; Direct entry admission into the second year (200 Level) of the degree programme; and Direct entry admission into third year (300 Level). Data on the modes of entry and Cumulative Grade Point Average (CGPA) at the time of graduation obtained from the ten departments in Faculty of Engineering and Technology at University of Ilorin, for students who graduated in 2018/2019 session, were analysed. Out of the 471 students, 24 graduated with first class honours with 22 of them being UTME students and two being Remedial students. The number of UTME, Remedial, Direct Entry students at 200 Level, and Direct Entry students at 300 level were: 377, 66, 26, and 2 and the averages of their CGPA were: 3.58, 3.27, 3.60, and 3.52, respectively. There was statistically significant difference between the CGPAs of graduates who were admitted through UTME, Remedial and Direct Entry at 200 level. It is recommended that the admission quota of Direct Entry candidates be increased and the UTME candidates should continue to have the highest percentage of admission spaces.
  • Model development and optimization of process conditions for color properties of tomato in a hot-air convective dryer using box–behnken design
    Obafemi I. Obajemihi, Joshua O. Olaoye, John O. Ojediran, Jun‐Hu Cheng, Da‐Wen Sun
    Journal of Food Processing and Preservation, 2020
  • Influence of tillage systems, nutrient application and weed management on chemical properties of sandy loamy soil and yield components of Soybean
    Joshua O. Olaoye, Ezekiel O. Ariyo
    Asabe 2020 Annual International Meeting, 2020
  • Emission characteristics of a compression ignition engine running castor biodiesel as a blending agent
    Agricultural Engineering International Cigr Journal, 2020
  • Effect of packaging and storage structures on moisture content of stored shea kernel
    Shuaeeb N. Oyewole, Joshua O. Olaoye, Mary O. Olaoye
    Asabe 2020 Annual International Meeting, 2020
  • Development of a slider crank squeezing action sugarcane juice extractor
    AMA Agricultural Mechanization in Asia Africa and Latin America, 2019
  • An investigation into some crop residues generation from farming activities and inherent energy potentials in Kwara State, Nigeria
    E A Alhassan, J O Olaoye, T M A Olayanju, C E Okonkwo
    Iop Conference Series Materials Science and Engineering, 2019
  • Estimation of wood residues generation from sawmilling activities and energy potential in Kwara State, Nigeria
    Nature Environment and Pollution Technology, 2019
  • Design and fabrication of a mechanised centrifugal melon shelling and cleaning machine
    International Journal of Agricultural Technology, 2018
  • Development of a hydro-separating cowpea dehuller
    AMA Agricultural Mechanization in Asia Africa and Latin America, 2017
  • Selected physical properties of African pear seed forconsidering in design of mechanical expeller
    Arpn Journal of Engineering and Applied Sciences, 2016
  • Performance testing of small-scale equipment for depulping locust bean seed
    J. Olaoye
    Transactions of the Asabe, 2016
  • Development of a dryer for processed locust bean condiments
    American Society of Agricultural and Biological Engineers Annual International Meeting 2015, 2015
  • Influence of temperature regulating device and relative humidity monitoring on performance of a natural convective heated incubator
    American Society of Agricultural and Biological Engineers Annual International Meeting 2015, 2015
  • Design and fabrication of hydro-separating cowpea dehuller
    American Society of Agricultural and Biological Engineers Annual International Meeting 2015, 2015
  • Performance evaluation of motorized and treadle cowpea threshers
    Agricultural Engineering International Cigr Journal, 2013
  • Optimization of some "poundo" yam production parameters
    Agricultural Engineering International Cigr Journal, 2012
  • Development of management tool and computerization of mechanized aquacultural farm operations
    Advances in Environmental Biology, 2011
  • Computer applications for selecting operating parameters of stationary grain crop thresher
    International Journal of Agricultural and Biological Engineering, 2010
  • Influence of tillage on crop residue cover, soil properties and yield components of cowpea in derived savannah ectones of Nigeria
    J.O. Olaoye
    Soil and Tillage Research, 2002
  • Development and testing of a milled shea nut mixer
    Journal of Food Science and Technology, 2001
  • Some physical properties of castor nut relevant to the design of processing equipment
    Joshua Olanrewaju Olaoye
    Journal of Agricultural and Engineering Research, 2000

RECENT SCHOLAR PUBLICATIONS

  • Development and Statistical Evaluation of Fortified Soil Nutrient Formulation from Sugarcane Leaves Biomass for Soil Amelioration
    C Ejieji, E Alhassan, JO Olaoye, MO Sunmonu, QB Adeyi
    Yuzuncu Yıl University Journal of Agricultural Sciences, 1667829 , 2026
    2026
  • Transformative trends: commercial platforms revolutionizing rice farming in Nigeria's agricultural value chain
    MS Sanusi, OM Mayokun, MO Sunmonu, S Yerima, D Mobolaji, ...
    International Journal of Agricultural Sustainability 23 (1), 2473757 , 2025
    2025
    Citations: 22
  • Evaluation of a Single Cylinder Compression Ignition Engines Operated with Castor Biodiesel Blends
    RA Busari, JO Olaoye, KP Alabi, KR Adebayo
    Sri Lankan Journal of Agriculture and Ecosystems 6 (2) , 2024
    2024
  • RSM-based co-gasification of palm oil decanter cake and sugarcane bagasse: Syngas production and biochar characteristics
    KJ Abioye, NY Harun, M Yusuf, H Kamyab, JO Ighalo, W Almusattar, ...
    Biomass and Bioenergy 191, 107482 , 2024
    2024
    Citations: 11
  • Statistical modelling of a tractor tractive performance during ploughing operation on a tropical Alfisol
    EA Alhassan, JO Olaoye, AF Lukman, TA Adekanye, OM Abioye
    Open Agriculture 9 (1), 20220282 , 2024
    2024
    Citations: 4
  • Digitalization of rice value chain in Nigeria with circular economy inclusion for improved productivity–A review
    MM Odewole, MS Sanusi, MO Sunmonu, S Yerima, D Mobolaji, ...
    Heliyon 10 (11) , 2024
    2024
    Citations: 7
  • Tractor acquisition and agricultural performance among Nigerian farmers: Evidence from Co-integration Modeling technique
    EA Alhassan, JA Asaleye, JK Biniyat, TR Alhassan, JO Olaoye
    Heliyon 10 (2) , 2024
    2024
    Citations: 5
  • Statistical modelling of a tractor tractive performance during ploughing operation on a tropical Alfisol
    AE Aina, JO Olaoye, LA Folaranmi, AT Adesoye, AO Matthew
    Open Agriculture 9 (1) , 2024
    2024
  • DYNAMIC BALANCING AND OPTIMUM PERFORMANCE OF A MELON DEPODDING AND WASHING MACHINE
    AA Adebayo, MO Olaoye, JO Olaoye
    2024 ASABE Annual International Meeting, 1 , 2024
    2024
  • THE EFFECTS OF SPINDLE TYPES AND KNEADING SPEED ON THE YIELD OF SHEA BUTTER IN AN AUTOMATED KNEADING MACHINE
    IP Duniya, MO Olaoye, JO Olaoye
    2024 ASABE Annual International Meeting, 1 , 2024
    2024
  • COMPARATIVE STUDY OF THE EFFECT OF LAND LEVELLING AND TILLAGE OPERATION ON SOME PHYSICAL PROPERTIES OF LOAMY SAND IN 2018 AND 2019 CROPPING SEASON
    G Lateef, JO Olaoye, OE Ariyo
    THEME: TILLAGE FOR SUSTAINABLE ENVIRONMENT, 199 , 2023
    2023
  • EFFECT OF REDUCED TILLAGE, NUTRIENT AND WEED MANAGEMENT ON GROWTH AND YIELD OF SOYBEAN (Glycin max L)
    EO Ariyo, JO Olaoye, L Gbadamosi
    THEME: TILLAGE FOR SUSTAINABLE ENVIRONMENT, 79 , 2023
    2023
  • Development and evaluation of a combined roaster expeller for castor seeds for biodiesel production
    RA Busari, JO Olaoye, ES Adebayo, A Fadeyibi
    Research in Agricultural Engineering 68 (4), 169-179 , 2022
    2022
    Citations: 7
  • Determination of Crop and Machine Parameters Relevant to the Harvesting and Postharvest Handling of Acha
    UI Tanam
    Journal of Agricultural Engineering and Technology (JAET) Vol 27 No. 1 , 2022
    2022
    Citations: 2
  • PERFORMANCE EVALUATION OF A MULTI-LAYER SOLAR TENT DRYER USING SHEA NUT
    SN Oyewole, JO Olaoye, SA Ibrahim, IS Ayanda, AO Ogunbiyi, ...
    Journal of Agricultural Engineering and Technology (JAET) 27 (2), 69-82 , 2022
    2022
    Citations: 1
  • INFLUENCE OF TILLAGE, NUTRIENT AND WEED MANAGEMENT ON CHEMICAL PROPERTIES OF SANDY-LOAM SOIL AND YIELD OF SOYBEAN
    EO ARIYO, JO OLAOYE, SN OYEWOLE
    Journal of Agricultural Engineering and Technology (JAET) 27 (1), 62-76 , 2022
    2022
  • Establishment of a Functional Relationship for Acha Harvester Material Capacity and Energy Requirement Based on Machine Operating Parameters Using Regression Modelling Approach
    UI TANAM, TA Ishola, JO OLAOYE
    Journal of Agricultural Engineering and Technology (JAET) 27 (2), 32-42 , 2022
    2022
    Citations: 1
  • Optimization of process conditions for moisture ratio and effective moisture diffusivity of tomato during convective hot‐air drying using response surface methodology
    OI Obajemihi, JO Olaoye, JH Cheng, JO Ojediran, DW Sun
    Journal of Food Processing and Preservation 45 (4), e15287 , 2021
    2021
    Citations: 23
  • Modelling and optimization of drying rate and quality parameters of foam mat dried mango powder
    CA Adamade, JO Olaoye
    Global Journal of Engineering and Technology Advances 8 (3), 032-037 , 2021
    2021
    Citations: 2
  • Effect of shelling speed, moisture content and number of beaters on the cleaning and recovery efficiency of a mechanized centrifugal Melon shelling machine
    BA Oluwabukola, OO Joshua, A Gbabo, IM Gana, EA Ndudi, TL Jacob
    World Journal of Advanced Research and Reviews , 2021
    2021
    Citations: 3

MOST CITED SCHOLAR PUBLICATIONS

  • Measurement of agricultural mechanization index and analysis of agricultural productivity of farm settlements in Southwest Nigeria
    JO Olaoye
    Agricultural Engineering International: The CIGR Journal , 2010
    2010
    Citations: 117
  • Research Note (PH—Postharvest Technology): Some Physical Properties of Castor Nut relevant to the Design of Processing Equipment
    JO Olaoye
    Journal of agricultural Engineering research 77 (1), 113-118 , 2000
    2000
    Citations: 105
  • Influence of tillage on crop residue cover, soil properties and yield components of cowpea in derived savannah ectones of Nigeria
    JO Olaoye
    Soil and Tillage Research 64 (3-4), 179-187 , 2002
    2002
    Citations: 88
  • Optimization of some “poundo” yam production parameters
    JO Olaoye, SN Oyewole
    Agricultural Engineering International: CIGR Journal 14 (2), 58-67 , 2012
    2012
    Citations: 50
  • Performance evaluation of motorized and treadle cowpea threshers
    AA Timothy, JO Olaoye
    Agricultural Engineering International: CIGR Journal 15 (4), 300-306 , 2013
    2013
    Citations: 36
  • Performance evaluation of an indigenous rotary power weeder
    JO Olaoye, OD Samuel, TA Adekanye
    Energy and Environmental EngineeringJournal 1 (1), 94-97 , 2012
    2012
    Citations: 31
  • An investigation into some crop residues generation from farming activities and inherent energy potentials in Kwara State, Nigeria
    EA Alhassan, JO Olaoye, TMA Olayanju, CE Okonkwo
    IOP Conference Series: Materials Science and Engineering 640 (1), 012093 , 2019
    2019
    Citations: 26
  • An evaluation of farm power and equipment ownership and management in Niger State, Nigeria
    JO Olaoye
    Nigerian Journal of Technological Development 5 (1), 94-102 , 2007
    2007
    Citations: 26
  • Development of a sugarcane juice extractor for small scale industries
    JO Olaoye
    Journal of Agricultural Technology 7 (4), 931-944 , 2011
    2011
    Citations: 24
  • Development of a Treadle Operated Abraisive-Cylinder for Threshing Cow Pea
    JO Olaoye
    Proceedings of International Agricultural Engineering Conference, Asian … , 2010
    2010
    Citations: 24
  • Optimization of process conditions for moisture ratio and effective moisture diffusivity of tomato during convective hot‐air drying using response surface methodology
    OI Obajemihi, JO Olaoye, JH Cheng, JO Ojediran, DW Sun
    Journal of Food Processing and Preservation 45 (4), e15287 , 2021
    2021
    Citations: 23
  • Transformative trends: commercial platforms revolutionizing rice farming in Nigeria's agricultural value chain
    MS Sanusi, OM Mayokun, MO Sunmonu, S Yerima, D Mobolaji, ...
    International Journal of Agricultural Sustainability 23 (1), 2473757 , 2025
    2025
    Citations: 22
  • Model development and optimization of process conditions for color properties of tomato in a hot‐air convective dryer using box–behnken design
    OI Obajemihi, JO Olaoye, JO Ojediran, JH Cheng, DW Sun
    Journal of Food Processing and Preservation 44 (10), e14771 , 2020
    2020
    Citations: 22
  • An analytical modeling of the performance of tooth peg grain crop thresher
    JO Olaoye
    Unpublished PhD theses. Department of Agricultural and Biosystems … , 2004
    2004
    Citations: 22
  • Development and testing of a milled shea nut mixer.
    JO Olaoye, OO Babatunde
    2001
    Citations: 22
  • Design, Fabrication and Performance of a Multipurpose Row Planting Machine
    JO Olaoye, SJ Bolufawi
    Journal of Sustainable Agriculture and the Environment (J. Sustain. Agric … , 2001
    2001
    Citations: 22
  • Development of Small Scale Equipment for Depulping Locust Bean Seeds
    JO Olaoye
    Proceedings of International Agricultural Engineering Conference, Asian … , 2010
    2010
    Citations: 21
  • Development and evaluation of a rotary power weeder
    JO Olaoye, TA Adekanye
    Tillage for agricultural productivity and environmental sustainability … , 2013
    2013
    Citations: 20
  • Some physical and mechanical properties of selected grain crops
    JO Olaoye, KC Oni
    Proceedings of the 2nd International Conference & 23rd Annual General … , 2001
    2001
    Citations: 19
  • Properties influencing cracking and separation of palm nuts in a mechanical cracker cum separator
    JO OLAOYE, TA ADEKANYE
    Croatian journal of food science and technology 10 (1), 42-50 , 2018
    2018
    Citations: 18