I. I. Dominic, N. M. Akpan Sweet pepper, maize, manure rates, residual effect, system intensification 79-84 9 (3) July 2025 This experiment was carried out to evaluate the residual effects of organic and inorganic fertilizers previously applied to sweet pepper on the performance of maize. Residual effect of different manure rates (control (zero application), 5 t/ha of PM, 10 t/ha of PM, 300 kg/ha of NPK 15:15:15, 5 t/ha of PM + 200 kg/ha of NPK 15:15:15 and 10 t/ha of PM + 100 kg/ha of NPK 15:15:15) on the field. The results obtained suggested sufficient left over of manure/fertilizer which was enough to effectively support at least one more planting season on the same plot of land without any additional manure/ fertilizer but a different type of crop other than the first crop should be planted to avoid a buildup of disease/pathogen. Therefore using the same plot of land will optimize profit and reduce input costs (manure/fertilizer) as 10 t/ha of PM produced cob dry weight of 232.8 g significantly higher than control plot that produced 84.4 g of cob dry weight. Our findings suggest that sustainable agricultural system intensification may be feasible in the study location.