Journal of Agronomy1812-53791812-5417Asian Network for Scientific Information10.3923/ja.2021.17.24Dioscorea rotundata Poir.)]]>Ogheneweware EmedeTimon ShakedeObaro Dennis AigbeUyiosasere 12021201Background and Objective: White yam is one of the most cultivated and accepted species of yam in Nigeria and its production is constrained by many challenges such as high cost of production and poor yield due to low soil nutrient amongst others. Hence, a study was carried out to evaluate the comparative effect of NPK (15:15:15) and poultry manure on the growth and yield of white yam. Materials and Methods: The experiment was laid out in a randomized complete block design with three replications. The experiment involved seven treatments: 400 kg ha1 NPK (15:15:15), 200 kg ha1 NPK+20 t ha1 poultry manure (PM), 40 t ha1 PM, 30 t ha1 PM, 20 t ha1 PM, 10 t ha1 PM and control. NPK fertilizer was applied in about 3 drills made around the plant, while the poultry manure was applied on the mound as mulch at 6 weeks after planting. Results: Results indicated that NPK (15: 15: 15) produced the highest dry matter yield of 20.36 t ha1 compared to poultry manure treatments which had dry matter yield of 14.93-16.42 t ha1, while control had 15.21 t ha1. The fresh tuber yield of poultry manure treatments varied from 45.89-57.22 t ha1, while NPK fertilizer and control had fresh tuber yield of 48.22 and 48.67 t ha1, respectively. Conclusion: Poultry manure at a rate of 40 t ha1 effectively increased soil fertility and produced the highest tuber weight and yield.]]>Mbah, E.U. and I.A. Ikoro,20191296100Agbede, T.M., A.O. Adekiya and J.S. Ogeh,201359803822Odjugo, P.A.O.,2008Dioscorea cayenensis) in Midwestern Nigeria.]]>745004507Agbede, T.M. and A.O. Adekiya,201220286303Agbede, T.M.,20068618FAOSTAT.,20122012Nwaoguala, N.C. and K.E. Law-Ogbomo,2018Dioscorea rotundata Poir) in an ultisols environment.]]>10516521Ajayi, S.S., E.A. Akinrinde and R. Asiedu,2006Dioscorea species) tuber yield in two soil types of Nigeria.]]>5492496Law-Ogbomo, K.E. and S.U. Remison, 2008Dioscorea rotundata Poir.) influenced by NPK fertilization on a forest site in Nigeria. ]]>462124Okojie, O.M., M.A. Osajiele and I.O. Osemwota,2019Dioscorea rotundata Poir) storage in the forest derived savanna ecological zones of Edo State, Nigeria.]]>42632Okojie, O.M., G.O. Okodugha and P.I. Itaman, 2019Dioscorea rotundata) and on soil chemical properties of the forest derived savanna zone of edo state Nigeria. ]]>61320Ayoola, O.T., 2006211121116Oladipo, F.O., O. Bolarin, B.M. Matanmi, O.W. Kareem and R.O. Ogunmola, 200951421Law-Ogbomo, K.E., S.U. Remison and E.O. Jombo,2011Amaranthus cruentus in an ultisol environment.]]>3247252Agbede, T.M., S.O. Ojeniyi and A.J. Adeyemo,200827277Okoli, P.S.O. and I.A. Nweke,20153362367El‐Shakweer, M.H.A., E.A. El-Sayad and M.S.A. Ewees,19982920672088Samuel, R.C., F.N. Ikepe, J.A. Osakire, A. Tenkonamo and I.C. Okerter,200346468Moyin-Jesu, E.I. and C.O. Adeofun,2008203145Nyathi, P. and B.M. Campbell, 19953451465Ayeni, L.S., O.M. Ayeni, O.P. Oso and S.O. Ojeniyi,2008Theobroma cacao) seedlings in the nurseries.]]>3323326Olatunji, A.S, A.F. Abimbola and T.I. Asowata,2014425902606Climate-Data.Org, 20162016Ogeh, J.S. and E. Ukodo, 2012 206872Emede T.O. and O.A. Iworah, 2013Dioscorea rotundata Poir.) in Edo State Nigeria. ]]>135061Sikora, F.J. and K.P. Moore,20142014SAS,2003Law-Ogbomo K.E. and R.K.A. Egharevba, 2009Dioscorea rotundata under different NPK fertilizer regime in humid forest ultisols. ]]>10451456Ibeawuchi, I.I., E.U. Onweremadu and N.N. Oti, 2006Amaranthus cruentus) and water leaf (Talium triangulare) on degraded ultisol of Owerri, South Eastern Nigeria. ]]>55356Duncan, J.,20052005Zaman, M.S., M.A. Hashem, M. Jahiruddin and M.A. Rahim,201136357367Enujeke, E.C.,201342430Babasola, O.J., I.J. Olaoye, O.A. Alalade, B.M. Matanmi and O.D. Olorunfemi,2018164653