Asian Journal of Crop Science1994-78792077-2041Asian Network for Scientific Information10.3923/ajcs.2009.26.33Solanum tuberosum L.) as Influenced by NPK Fertilizer Rate and Type of Seed Tuber at Samaru, Nigeria]]>BabajiB.A. AmansE.B. ChiezeyU.F. FalakiA.M. TanimuB. MukhtarA.A. 1200911This research was initiated with the aim at finding
varieties of Potato that can respond to graded levels of NPK fertilizer
and form of seed tuber. The treatments tested consist of four rates of
NPK fertilizer (0, 300, 600 and 900 kg ha-1), two forms of
seed tuber (whole and cut-tubers) and four varieties of Irish potato (Greta,
Nicola, RC 767-2 and WC 732-1). A split-plot design was used in which
the factorial combinations of fertilizer rate and form of seed tuber were
assigned to the main plots while the varieties occupied the sub-plots.
The treatments were replicated three times. Varieties Nicola and RC 767-2
had the heaviest and least leaf and stem dry weights, respectively. Nicola,
RC 767-2 and WC 732-1 produced more tubers and unmarketable tuber yield
than Greta. Greta and RC 767-2 produced larger tubers than Nicola and
WC 732-1. The highest NPK rate of 900 kg ha-1 resulted in the
heaviest leaf and stem. Optimum tuber number and size was attained at
the higher fertilizer rate of 600 kg ha-1. Further increase
above 600 kg NPK ha-1 depressed tuber number and tuber weight
in 1997/98 and tuber size in 1998/99. The same 600 kg NPK ha-1
recorded the least unmarketable tuber yield. None of the factor measured
was affected by type of seed tuber. In conclusion RC 767-2 had the highest
plant dry weights as well as more tubers and unmarketable tuber yield
that were comparable to that of Nicola and WC 732-1. Greta and RC 767-2
had larger tubers than the other two varieties. The plant dry weights
were optimized at 900 kg NPK ha-1 while more tubers of larger
size were maximized at 600 kg NPK ha-1. The medium NPK rate
of 600 kg ha-1 had least unmarketable tuber yield. Planting
of either whole or cut tuber sett did not affect any of the parameter.]]>Anonymous,20072007Anonymous,20082008Babaji, B.A., U.F. Chiezey, J.M. Jibrin and A.A. Mukhtar,2005Solanum tuberosum L.).]]>56673Babaji, B.A., E.B. Amans, U.F. Chiezey, A.M. Falaki, M.M. Jaliya and A. Ibrahim,200612126Babaji, B.A., E.B. Amans, A.M. Falaki, U.F. Chiezey and M. Mahmud et al.,2007Solanum tuberosum L.) at Samaru, Nigeria.]]>22125Beukema, H.P. and D.E. Van-der -Zaag,19921992Crozier, C.R., N.G. Creamer and M.A. Cubeta,20042004Duncan, D.B.,195511142Harris, P.M.,19922nd Edn.,pp: 909pp: 909Jaiswal, V.P. and S.S. Saini,199118172174Khiari, L., L. Parent and N. Tremblay,200193815819Krantzer, B. and H. Waschl,19921992Kushwah, V.S. and J.S. Grewal,1990S. tuberosum).]]>60321327Locascio, S.J., J.A. Bartz and D.P. Weingartner,19926995104Mancini, L. and V. Marzi,1991474952Okonkwo, J.C., L.S.O. Ene and O.O. Okoli,19951995Sharma, U.C. and J.S. Grewal,1991184347Waddell, J.T., C. Gupta, J.F. Moncrief, C.J. Rosen and D.D. Steele,199991991997