Abstract: 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.