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Articles by C.I. Duruigbo
Total Records ( 2 ) for C.I. Duruigbo
  C.I. Duruigbo , J.C. Obiefuna and E.U. Onweremadu
  This study was conducted to determine the effect of poultry manure rates on soil acidity at the Federal University of Technology Research Farm Owerri. The experiment was laid out in randomized complete block design with three replications. Four poultry manure rates namely: 0, 5, 10 and 15 t ha-1 were used in the study. The soil physical and chemical status before and after application of poultry manure were analyzed. The chemical compositions of the poultry manure was analyzed. All data collected was subjected to analysis of variance according to the General linear model in statistical analysis software (SAS). Results indicated that application of poultry manure at the rate of 15 t ha-1 significantly increased soil pH from 4.14±0.9 (control) to 5.80±0.23 (pH in water) and from 3.62±0.13 to 5.78±0.18 (pH in KCl), respectively. Poultry manure rate of 5 t ha-1 did not significantly increase soil pH.
  G.O. Ihejirika , M.I. Nwufo , C.I. Duruigbo , E.U. Onwerenadu , O.P. Obilo , E.R. Onuoha and K.O. Ogbede
  A two season Experiment was conducted during the rainy seasons of 2003 and 2004 respectively, to determine the effects of plant extracts and plant density on the severity of leafspot disease and yield of groundnut Cercospora arachidicola Hori in Imo State. Analysis of variance indicated that plant extract was significant on leafspot disease severity and seed yield (kg ha-1) 110.05, 107.85 in 2003 and 2004. Similarly, plant density was highly significant on leafspot disease severity and seed yield (kg ha-1) 91.15, 88.36. Azadirachta indica spray recorded lowest leafspot disease severity while no spray (control) recorded highest. Plant density (10x10) cm recorded highest leafspot disease severity while (40x40) cm had the lowest. Also Azadirachta indica spray recorded the lowest seed yield (kg ha-1) 18.06; 17.08. Plant density of (10x10) cm recorded the lowest seed yield (kg ha-1) 16.22, 15.19, while (20x20) cm recorded highest seed yield (kg ha-1) 22.40; 20.69. leafspot disease severity increased with plants age.
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