Dr. Olayinka Bolaji Umar
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Dr. Olayinka Bolaji Umar

Lecturer II
University of Ilorin, Nigeria

Highest Degree
Ph.D. in Plant Biology from University of Ilorin, Nigeria

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Area of Interest:

Plant and Soil Sciences
100%
Environmental Botany
62%
Agricultural Research
90%
Plant Physiology
75%
Food Science
55%

Research Publications in Numbers

Books
0
Chapters
0
Articles
0
Abstracts
0

Selected Publications

  1. Olayinka, B.U., RF. Ogungbemi, O.O. Abinde, A.R. Lawal, A.A. Abdulrahaman and E.O. Etejere, 2019. Proximate and phytochemical compositions of leaf and root of (Cattle stick) Carpolobia lutea g. don. J. Applied Sci. Environ. Manage., 23: 53-57.
    CrossRef  |  Direct Link  |  
  2. Olayinka, B.U., A.R. Lawal, S.A. Abdulbaki, A. Ayinla and LT. Oladokun et al., 2019. Bioproductivity and grain quality of two cowpea varieties in relation to frequency of hand weeding. J. Applied Sci. Environ. Manage., 23: 1013-1020.
    CrossRef  |  Direct Link  |  
  3. Hammed, A., B.U. Olayinka, A.A. Shehu, Y. Alzahrani and L.T. Oladokun et al., 2019. Effects of pretilachlor and 2,4-dichlorophenoxyacetic acid on the proximate and mineral compositions of Oryza sativa L. Int. J. Bot., 15: 22-27.
    CrossRef  |  Direct Link  |  
  4. Olayinka, B.U. and E.O. Etejere, 2018. Proximate and chemical compositions of watermelon (Citrullus lanatus (Thunb.) matsum and nakai and cucumber (Cucumis sativus L.). Int. Food Res. J., 25: 1060-1066.
    Direct Link  |  
  5. Lawal, A.R., B.U. Olayinka, R.A. Murtadha, A. Ayinla and E.O. Etejere, 2018. Comparative analysis of phytochemical and proximate composition of Allium sativum L. and Zingiber officinale Rosc. Niger. J. Basic Applied Sci., 26: 82-87.
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  6. Garuba, T., B.U. Olayinka, KA. Abdulkareem. M.O. Bello, A.A. Hamid and F.Y. Olaleye, 2018. A study on endophytic fungi, proximate and chemical compositions of a local variety of mango fruit (Mangifera indica L.). J. Univ. Ruhuna, 6: 61-69.
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  7. Ayinla, A., I.A. Alagbe, B.U. Olayinka, A.R. Lawal, O.O. Aboyeji and E.O. Etejere, 2018. Effects of organic, inorganic and organo-mineral fertilizer on the growth, yield and nutrient composition of Corchorus olitorious (L). Ceylon J. Sci., 47: 13-19.
    CrossRef  |  
  8. Abdulrahaman, A.A., B.U. Olayinka,. A.A. Sahhli and F.A. Oladele, 2018. Is leaf size a factor in determination of the rate of transpiration in Canna indica and Euphorbia Milli. J. Indian Bot. Soc., 97: 53-59.
  9. Olayinka, B.U., L.L. Adefalu, Y.A. Adisa, A.R. Lawal and E.O. Etejere, 2017. Effects of spatial arrangements of groundnut-maize intercrop on growth, yield and proximate composition of groundnut. Al-Hikmah J. Pure Applied Sci., 5: 1-7.
    Direct Link  |  
  10. Olayinka, B., O. Esan, I. Anwo and E. Etejere, 2017. Comparative growth analysis and fruit quality of two varieties of tomato under hand weeding and pendimethalin herbicide. J. Agric. Sci., 12: 149-161.
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  11. Etejere, E.O., B.U. Olayinka and R.O. Aderemi, 2017. Phytochemical analysis of aqueous extract and proximate composition of Chromolaena odorata (L). Center Point J., 23: 173-182.
  12. Ahmed, O., B.U. Olayinka, T. Garuba, J. Ahmed and E.O. Etejere, 2017. Germination of several groundnut cultivars in relation to incidence of fungi. Sci. World J., 12: 38-41.
    Direct Link  |  
  13. Abdul Rahaman, A.A., B.U. Olayinka, M.O. Adebola and F.A. Oladele, 2017. Fambo Botanical Dictionary. 1st Edn., Impresmedia Publishing, Ilorin, ISBN: 978-978-960-123-3..
  14. Olayinka, B.U., S.S. Afolayan, R.T. Mohammed, O.O. Abinde and E.O. Emmanuel, 2016. Biological yield and proximate composition of bambara groundnut (Vigna subterranea (L) Verdc.) as influenced by sowing depths and soil types. Ann. West Univ. Timisoara, 19: 177-186.
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  15. Olayinka, B.U., S.O. Owodeyi and E.O. Etejere, 2016. Biological productivity and composition of groundnut in relation to seed size. Environ. Exp. Biol., 14: 9-14.
    Direct Link  |  
  16. Olayinka, B.U., G.S. Olahan, T.O. Obadire, D.A. Raiyemo and R.T. Mohammed, 2016. Effect of storage materials on viability and proximate composition of Garcinia kola Heckel. J. Applied Sci. Environ. Manage., 20: 897-900.
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  17. Olayinka, B.U., E.T. Ayanduro, A.A. Abdulrahaman and E.O. Etejere, 2016. Effects of salinity and Ethylenediamine Tetra Acetic Acid (EDTA) on the germination of tomato (Solanum lycopersicum L.) seeds. Sci. World J., 11: 1-3.
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  18. Olayinka, B.U. and E.O. Etejere, 2016. Weed control methods affect growth, yield and economic returns in groundnut. Ann. West Univ. Timisoara: Ser. Biol., 19: 17-24.
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  19. Ayinla, A., B.U. Olayinka and E.O. Etejere, 2016. Rice straw: A valuable organic manure for soil amendment in the cultivation of groundnut (Arachis hypogaea). Environ. Exp. Biol., 14: 205-211.
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  20. Ayinla, A., B.U. Olayinka and E.O. Etejere, 2016. Effects of ground and unground rice straw on the yield and proximate composition of groundnut (Arachis hypogeae L.). Notulae Scientia Biologicae, 8: 176-180.
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  21. Olayinka, B.U., E.O. Etejere, B.Z. Salihu and B.J. Lawal, 2015. Growth and yield attributes of Zea mays L. and Vigna unguiculata L. (WALP) to different densities of Tithonia diversifolia (Helms) A. Gray. Agronomski Glansnik, 4: 207-218.
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  22. Olayinka, B.U., D.A. Raiyemo and E.O. Etejere, 2015. Phytochemical and proximate composition of T. diversifolia (Hemsl) A. Gray. Ann. Food Sci. Technol., 16: 195-200.
  23. Olayinka, B.U., B.T. Yusuf and E.O. Etejere, 2015. Growth, yield and proximate composition of groundnut (Arachis hypogaea L.) as influenced by land preparation methods. Notulae Scientia Biologicae, 7: 227-231.
    Direct Link  |  
  24. Olayinka, B.U., A. Ayinla, F.O. Ogbeche and E.O. Etejere, 2015. Comparative evaluation of NPK and cowdung on growth and proximate composition of Amaranthus hybridus L. Biol. Environ. Sci. J. Trop., 12: 748-755.
  25. Olayinka, B.U. and E.O. Etejere, 2015. Growth analysis and yield of two varieties of groundnut (Arachis hypogaea L.) as influenced by different weed control methods. Indian J. Plant Physiol., 20: 130-136.
    CrossRef  |  Direct Link  |  
  26. Etejere, E.O., B.U. Olayinka and L.O. Lawal, 2015. Comparative studies of phytochemical constituents of leaf, bark and root of Moringa oleifera Lam. Jewel J. Scient. Res., 3: 173-176.
  27. Etejere, E.O. and B.U. Olayinka, 2015. Seed production, germination, emergence and growth of Tithonia diversifolia (Hemls) A. Gray as influenced by different sowing depths and soil types. Albanian J. Agric. Sci., 14: 294-299.
  28. Olayinka, B.U., D.A. Raiyemo, E.O. Etejere and A.O. Udeze, 2014. In vitro antimicrobial activities of Tithonia diversifolia (Hemsl) A. Gray extracts on two bacteria and fungus isolates. J. Chem. Pharmaceut. Res., 6: 2765-2768.
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  29. Abdulrahaman, A.A., B.U. Olayinka, Z.D. Adrauwus, T.A. Aluko, M.O. Adebola and F.A. Oladele, 2014. Traditional preparation and uses of groundnut in Nigeria. Ann. Food Sci. Technol., 15: 34-39.
  30. Olayinka, B.U., M.O. Adebola and O.O. Arinde, 2013. Growth performance of groundnut and incidence of foliar diseases (Arachis hypogaea L) in spent engine oil polluted soil augmented with cow dung. World Applied Sci. J., 27: 1408-1412.
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  31. Olayinka, B.U. and E.O. Etejere, 2013. Influence of weed management strategies on proximate composition of two varieties of groundnut (Arachis hypogaea L.). Ann. Food Sci. Technol., 14: 286-293.
  32. Abdulrahaman, A.A., B.U. Olayinka, M.I. Haruna, B.T.I. Yusuf and M.O.I. Aderemi et al., 2013. Cooling effects and humidification potentials in relation to stomatal features in some shade plants. Int. J. Appl. Sci. Technol., 3: 138-152.
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  33. AbdulRahaman, A.A., A.A. Afolabi, B.U. Olayinka, O.T. Mustapha, K.A. Abdulkareem and F.A. Oladele, 2013. Effects of sodium azide and nitrous acid on the morphology and leaf anatomy of Jatropha curcas L. (Euphorbiaceae). Int. J. Phytofuels Allied Sci., 2: 30-41.
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  34. Olayinka, B.U., O.O. Arinde and E.O. Etejere, 2012. Effect of Spent Engine Oil (SEO) on germination and seedling growth of groundnut (Arachis hypogaea L.). J. School Sci. Technol. Math. Educ., 8: 34-43.
  35. Abdulrahaman, A.A., B.U. Olayinka, B.P. Olumodeji and F.A. Oladele, 2012. Responses of some grasses species to diesel fuel contaminated soil. Niger. J. Life Sci., 2: 59-65.
  36. Abdulrahaman, A.A., B.U. Olayinka, M.O. Adeyemi and F.A. Oladele, 2011. Effects of Dual Purpose Kerosene (DPK) on the growth and leaf epidermal features of Ipomoea aquatic (Order-Ornales, Family-Convolvulaceae) in an experimentally polluted soil. J. School Sci. Technol. Math. Educ., 8: 11-21.
  37. Olayinka, B.U., K.S. Olorunmaye and E.O. Etejere, 2009. Influence of metolachlor on physiological growth character of tomato (Lycopersicon esculentum L.). Ethnobot. Leaflets, 13: 1288-1294.
    Direct Link  |  
  38. AbdulRahaman, A.A. and B.U. Olayinka, 2008. Anatomy and Histology of Spermatophytes. Rajim Printers and Publishers, Ilorin.