1. Efosa, O.P., O.O. Philip and O.O. Paul, 2020. Coconut (Cocos nucifera L.) seedlings performance in relation to rock phosphate application in an Ultisol at Nifor main station. Asian J. Agric. Res., 14: 13-18.
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2. Osayande, P.E., P.O. Oviasogie, E.R. Orhue, B.E. Awanlemhen and E. Oko-oboh, 2017. Phosphorus sorption in hydromorphic soils overlying alluvium and coastal plain sand parent materials in Delta State, Nigeria. Commun. Soil Sci. Plant Anal., 48: 955-962.
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3. Osayande, P.E., P.O. Oviasogie, E.R. Orhue, I.M. Koloche, B.E. Awanlemhen and A. Nkechika, 2016. Response of date palm (Phoenix dactylifera L.) seedlings to various rates of organic and inorganic fertilizers at Dutse, Jigawa state, Nigeria. J. Agric. For. Fisher., 15: 55-59.
4. Osayande, P.E., E.R. Orhue, P.T. Ikyaahemba, C.O. Ogbebor, I.M. Koloche and J.J. Udoh, 2016. Influence of oil palm (Elaeis guineesis Jacq) age on some physical and chemical properties of an alfisol in Offa, Southwestern, Nigeria. J. Agric. For. Fisher., 15: 1-6.
5. Osayande, P.E., E.R. Orhue, A.A. Oneju, D.O. Oseghe, F.U. Maidoh and P. Irhemu, 2016. Biophysical properties of selected areas of Delta state and their suitability assessment for coconut, raphia and oil palms cultivation. Biol. Environ. Sci. J. Tropics, 6: 32-37.
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6. Osayande, P.E., E. Omoruyi, S. Ovie, O. Aondona and C.O. Ogbebor, 2016. Status and distribution of available micro nutrients in Soils of NIFOR Main Station. Int. J. Basic Sci. Technol., 2: 1-5.
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7. Osayande, P.E., A.A. Edokpayi, I.M. Koloche, C.O. Ogbebor and P. Irhemu, 2016. Quality indicators of soils under different cropping systems in shea (Vitelleria paradoxa Gaertn C. F) parklands of Bida in Niger state, Nigeria. Niger. J. Agric. Food Environ., 12: 62-66.
8. Orhue, E.R., A.A. Oneju, P.E. Osayande and Awanlemhen, 2016. Free oxide status and distribution in soils of some economic palms in selected areas of Delta State, Nigeria. Int. J. Basic Sci. Technol., 2: 39-45.
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9. Edokpayi, A.A., C.A. Agho, P.E. Osayande and S.U. Okpamen, 2016. The association between leaf nutrients of raphia palm (Raphia spp.) and soil properties in Southern Nigeria using canonical correlation analyses. Int. J Basic Sci. Technol., 2: 55-61.
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10. Ovie, S., P.O. Oviasogie, P.E. Osayande, A. Nkechika and P.T. Ikyaahemba, 2015. Improving the growth characteristics of oil palm (Elaeis guineesis Jacq) seedlings by mulching and depth of chemical fertilizer placement. Niger. J. Agric. Food Environ., 11: 78-83.
11. Osayande, P.E., P.O. Oviasogie, E.R. Orhue, P. Irhemu, F.U. Maidoh and D.O. Oseghe, 2015. Soil nutrient status of the Otegbo fresh water swamp in Delta State of Nigeria. Niger. J. Agric. Food Environ., 11 : 1-8.
12. Ikyaahemba, P.T., P.O. Oviasogie, S. Ovie, P.E. Osayande and E. Oko-oboh, 2015. Suitability assessment and evaluation of soils of fiidi for oil palm (Elaeis guineesis Jacq) cultivation in Benue state, North Central, Nigeria. Niger. J. Soil Environ. Res., 13: 83-92.
13. Edokpayi, A.A., P.E. Osayande, C.E. Ikuenobe and A.E. Aghimien, 2015. Multivariate analysis of soils under oil palm (Elaeis guineesis Jacq) cultivation in Nigeria. Niger. J. Agric. Food Environ., 11: 97-102.
14. Oviasogie, P.O., E.E. Ukpebor, E.A. Osharechiren and P.E. Osayande, 2014. Fractionation of phosphorus in soils amended with sokoto rock phosphate, cassava mill effluent and their effect on maize (Zea mays) growth. Niger. J. Agric. Food Environ., 10: 64-70.
15. Osayande, P.E., P.O. Oviasogie, M.O. Ekebafe and F.U. Maidoh, 2014. Assessment of degradation in soils of transplanted shea tree under two land use types at Bida, Niger state. Niger. Niger. J. Soil Sci., 24: 108-116.
16. Osayande, P.E., P.O. Oviasogie, B.E. Awanlemhen and E.R. Orhue, 2014. Soil fertility assessment of a shea (Vitellaria paradoxa C.F. Gaertn) field at Bida, Niger State. Niger. J. Soil Sci., 24: 117-124.
17. Ovie, S., G.U. Nnaji, P.O. Oviasogie, P.E. Osayande and P. Irhemu, 2013. Effects of composted oil palm bunch wastes and chemical fertilizer on growth of oil palm seedling under water stress condition. Agro Sci. J. Trop. Agric. Food Environ. Extension, 12:: 17-31.
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18. Ovie, S., G.U. Nnaji, P.O. Oviasogie, P.E. Osayande and A. Nkechika, 2013. Changes in physical properties of an ultisol as influenced by composted empty oil palm bunches and chemical fertilizer under water stress conditions. Niger. J. Soil Sci., 23: 235-251.
19. Osayande, P.E., P.O. Oviasogie, N.O. Aisueni, O. Stephen, P. Irhemu and M.O. Ekebafe, 2013. Assessment of dithionite and oxalate extractable iron and aluminium oxides in soils supporting Raphia palms at NIFOR main station. Niger. J. Soil Sci., 23: 1-9.
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20. Okpamen, S.U., P.O. Oviasogie, G.E. Ilori, P.E. Osayande and I.O. Uwubamwen, 2013. Remediation and management of acid sand soils in oil palm plantations by carbon sink techniques. Greener J. Agric. Sci., 3: 709-715.
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21. Ekebafe, M.O., L.O. Ekebafe, P.E. Osayande, F.U. Maidoh and P. Irhemu, 2013. Assessment of the water conservation potential and mode of application of coconut (Cocos nucifera L.) husk hydrogel on soil cultivated to coconut seedling. Niger. J. Soil Sci., 23: 10-19.
22. Osayande, P.E., P.O. Oviasogie, E.R. Orhue and A.E. Aghimien, 2012. Micro-nutrient status of soils of the fresh water swamp supporting Raphia hookeri (G. Mann and H. Wendl) cultivation at Otegbo, Delta State. J. Sustain. Environ. Manage., 4: 1-9.