Joshua Olanrewaju Olaoye

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

Scopus Publications

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, and Joshua Olanrewaju Olaoye
Informa UK Limited



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, Wael Almusattar, Joshua Olanrewaju Olaoye, Adesoji Matthew Olaniyan, M. Atif, Ashok Kumar,et al.
Elsevier BV



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, and J.O. Olaoye
Elsevier BV



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, and Oluwaseyi Matthew Abioye
Walter de Gruyter GmbH
Abstract 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.


DYNAMIC BALANCING AND OPTIMUM PERFORMANCE OF A MELON DEPODDING AND WASHING MACHINE
A. A. Adebayo, M. O. Olaoye, and J. O. Olaoye
American Society of Agricultural and Biological Engineers



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, and J. O. Olaoye
American Society of Agricultural and Biological Engineers



Development and evaluation of a combined roaster expeller for castor oil seeds for biodiesel production
Rasheed Amao Busari, Joshau Olarnrewaju Olaoye, Emmanuel Segun Adebayo, and Adeshina Fadeyibi
Czech Academy of Agricultural Sciences
A combined roaster and oil expeller was developed with locally available and accessible materials and the efficiency of the machine was evaluated. The obtained result shows that the efficiency of the machine is a function of the roasting temperature, the roasting duration, the moisture contents of the processed seeds and the machine feeding rate. The expeller is movable, simple in design for local fabrication, is easy to operate, requires few repairs and little maintenance and is cost effective. It is powered using a gear reduction electric motor of 5.5 Hp, the expeller has an average oil yield of 25.77% and an extraction efficiency of 70.26% and is designed to work for 8 hours per day of operation. The shaft diameter was designed to be 30 mm, while the roaster heater capacity was 2.8 kW. The designed machine is good for castor oil expression for both small- and medium-scale processing among rural and urban communities.


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, and Da‐Wen Sun
Hindawi Limited



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, and Ademola A. Ajayi-Banji
IEEE
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, and Da‐Wen Sun
Hindawi Limited



Influence of tillage systems, nutrient application and weed management on chemical properties of sandy loamy soil and yield components of Soybean
Joshua O. Olaoye and Ezekiel O. Ariyo
American Society of Agricultural and Biological Engineers



Effect of packaging and storage structures on moisture content of stored shea kernel
Shuaeeb N. Oyewole, Joshua O. Olaoye, and Mary O. Olaoye
American Society of Agricultural and Biological Engineers



Emission characteristics of a compression ignition engine running castor biodiesel as a blending agent




Development of a slider crank squeezing action sugarcane juice extractor




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, and C E Okonkwo
IOP Publishing
AbstractIn recent time, interest in energy generation from biological materials has been on the increase because of its environmental benefits. The use of these waste materials as feedstock in energy generation plants has been used in many industrial processes. The availability of these wastes is key to the sustainability of such a process. Resource assessment is an important step for planning and implementation of any energy workflow. This research studied the quantity of crop residues generated from farming of some crops in Kwara State and the potential energy contents inherent in them which when properly harnessed can help to alleviate the energy challenge in the state. The crops investigated were rice, maize, sorghum, soybean, and sugar cane. Relevant data were collected by visiting major farm establishments in the state and also the Ministry of Agriculture and Natural Resources (MANR). Obtained production outputs for two farming seasons were analysed using the corresponding residue-to-crop ratios (RPR) to obtain the quantity of wastes generated and the corresponding unit conversion ratio for biomass energy content to obtain the inherent energy potentials. A total crop output of 2531.46 ton was obtained from the study with an estimated residue of 6047.02 tons, and inherent energy potential of 109201 GJ.


Estimation of wood residues generation from sawmilling activities and energy potential in Kwara State, Nigeria




Design and fabrication of a mechanised centrifugal melon shelling and cleaning machine




Development of a hydro-separating cowpea dehuller




Selected physical properties of African pear seed forconsidering in design of mechanical expeller




Performance testing of small-scale equipment for depulping locust bean seed
J. Olaoye
American Society of Agricultural and Biological Engineers (ASABE)
Abstract. Processing of African locust bean seed starts with pretreatment of the harvested fruit before the seed can be converted into its numerous derivatives. Depulping of locust bean seed precedes cooking in locust bean processing. This operation requires much time and energy, which poses difficulties for the women and children who are involved in the processing of locust bean. This study focused on the development of small-scale equipment for depulping of African locust bean seed. Design, construction, and testing of the equipment were undertaken. The techno-economic status of the women in the rural areas who are directly involved in the processing of locust bean and its derivatives was taken into consideration. The depulping machine comprises a vertical cylindrical container, a cylindrical sieve, and a vertical rotating shaft that carries paddles and brushes. The vertical shaft is mounted at the central axis of the depulping unit. The machine has a capacity to depulp 10 kg of locust bean seed in a batch operation. Performance evaluation of the machine was carried out at five levels of soaking time (15, 30, 45, 60, and 75 min), corresponding to five levels of locust bean moisture content (20%, 25%, 30%, 35%, and 40% w.b.), and five operating speeds (550, 450, 350, 250, and 150 rpm). Results indicated that the depulping efficiency varied between 64% and 98% at moisture contents of 20% to 40% w.b. Seed membrane detachment and seed damage were less than 5% and 9.2%, respectively, at 45 min soaking time (moisture content of 30% w.b. with water at room temperature) and 350 rpm operating speed. The maximum power requirement was 2.25 kW at 550 rpm. The operating conditions of 350 rpm operating speed and 45 min soaking time indicated higher depulping efficiency (98%), lower seed membrane detachment (2%), and lower seed loss (4.5%) during depulping. The performance results showed that the mechanized depulping process compared favorably with the traditional method in terms of quantity of seed produced per batch operation.


Influence of temperature regulating device and relative humidity monitoring on performance of a natural convective heated incubator




Design and fabrication of hydro-separating cowpea dehuller




Development of a dryer for processed locust bean condiments




Performance evaluation of motorized and treadle cowpea threshers




Optimization of some "poundo" yam production parameters

RECENT SCHOLAR PUBLICATIONS

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



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



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



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 2024



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



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



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



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



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



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



Effect of shelling speed, moisture content and number of beaters on the cleaning and recovery efficiency of a mechanized centrifugal Melon shelling machine
OB Aturu, JO Olaoye, A Gbabo, IM Gana, NE Andrew, JT Liberty
World Journal of Advanced Research and Reviews 10 (3), 239-245 2021



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



Effects of operational conditions on exergy behaviour of biomass densification system and durability of the densified biomass
JO Olaoye, FB Olotu, OA Lasode, IP Duniya
ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT 16 (3), 475-490 2020



Emission characteristics of a compression ignition engine running castor biodiesel as a blending agent
RA Busari, JO Olaoye
Agricultural Engineering International: CIGR Journal 22 (2), 112-122 2020



Development and performance evaluation of a depodding machine for fresh melon pods
AA Adebayo, JO Olaoye
Journal of Agricultural Engineering (JAET) 25 (2), 29-43 2020



CHARACTERIZATION OF CASTOR BIODIESEL BLENDED WITH CONVENTIONAL DIESEL FUELS
RA Busari, JO Olaoye, A Fadeyibi, T Denen
Published by Nigerian Instituttion of Agricultural Engineers (NIAE) 2020



INFLUENCE OF TILLAGE SYSTEMS, NUTRIENT APPLICATION AND WEED MANAGEMENT ON CHEMICAL PROPERTIES OF SANDY LOAMY SOIL AND YIELD
JO Olaoye, EO Ariyo
2020 ASABE Annual International Virtual Meeting, 1 2020



Effect of packaging and storage structures on moisture content of stored shea kernel
SN Oyewole, JO Olaoye, MO Olaoye
2020 ASABE Annual International Virtual Meeting, 1 2020



Response surface methodology assessment of osmotic pre-drying and convective dehydration processes on the anti-oxidant property of Hausa variety of tomato
OI Obajemihi, JO Olaoye, MS Sanusi, TD Akpenpuun, KM Salawu, ...
Croatian journal of food science and technology 11 (2), 187-194 2019



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

MOST CITED SCHOLAR PUBLICATIONS

Measurement of agricultural mechanization index and analysis of agricultural productivity of farm settlements in Southwest Nigeria
JO Olaoye, AO Rotimi
Agricultural Engineering International: CIGR Journal 12 (1) 2010
Citations: 95



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
Citations: 94



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
Citations: 81



Optimization of some “poundo” yam production parameters
JO Olaoye, SN Oyewole
Agricultural Engineering International: CIGR Journal 14 (2), 58-67 2012
Citations: 47



Performance evaluation of motorized and treadle cowpea threshers
AA Timothy, JO Olaoye
Agricultural Engineering International: CIGR Journal 15 (4), 300-306 2013
Citations: 30



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
Citations: 26



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
Citations: 23



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
Citations: 19



Development of a sugarcane juice extractor for small scale industries
JO Olaoye
Journal of Agricultural Technology 7 (4), 931-944 2011
Citations: 18



Development of a Treadle Operated Abraisive-Cylinder for Threshing Cow Pea
JO Olaoye
Proceedings of International Agricultural Engineering Conference, Asian 2010
Citations: 18



Development of Small Scale Equipment for Depulping Locust Bean Seeds
JO Olaoye
Proceedings of International Agricultural Engineering Conference, Asian 2010
Citations: 18



Development and evaluation of a rotary power weeder
JO Olaoye, TA Adekanye
Proc. Nige. Soc. Agric. Engg 3, 189-199 2011
Citations: 17



Development and testing of a milled shea nut mixer.
JO Olaoye, OO Babatunde
2001
Citations: 17



Computer applications for selecting operating parameters of stationary grain crop thresher
JO Olaoye, KC Oni, MM Olaoye
International Journal of Agricultural and Biological Engineering 3 (3), 8-18 2010
Citations: 16



EVALUATION OF CONSTITUTIVE CONDITIONS FOR PRODUCTION OF SORGHUM STOVERS BRIQUETTE
JO Olaoye, EA Kudabo
Arid Zone Journal of Engineering, Technology and Environment 13 (3), 398 - 410 2017
Citations: 15



Effects of operative processing conditions on the performance of cowpea dehuller using selected cowpea varieties
FB Olotu, JJ Aduba, JO Olaoye
International Journal of Basic and Applied Sciences 2 (3), 71-78 2013
Citations: 15



Performance evaluation of an indigenous rotary power weeder
JO Olaoye, OD Samuel, TA Adekanye
Energy and Environmental EngineeringJournal 1 (1), 94-97 2012
Citations: 15



Some physical and mechanical properties of selected grain crops
JO Olaoye, KC Oni
Proceedings of the 2nd International Conference & 23rd Annual General 2001
Citations: 15



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
Citations: 15



Optimization of mechanical expression of castor seeds oil (Ricinus communis) using response surface methodology
JO Olaoye, RA Busari
Arid Zone Journal of Engineering, Technology and Environment 13 (6), 878 2017
Citations: 14