Determination of the Application Rate of Conventional Compost Integrated with Chemical Fertilizer on Maize (Zia Maize) Yield in Dugda District of East Shoa Zone, Oromia

Integrated soil fertility management is the application of inorganic in combination with organic fertilizer to maintain and improve crop yield. A study was conducted East Shoa Zone, Dugda District on farmers' fields determine combined effects conventional compost as NPS chemical properties maize production. There were five treatments: Recommended rate fertilizer, 100, 75, 50 25% equivalent level for nitrogen fertilizer. 69 P2O5/ha equally applied at all treatments. The experiment laid out RCBD design three replications. analysis variance showed no significant differences (P > 0.05) grain yield response. However, highest (8728.20 kg ha-1) obtained from treatment two that received 100% lowest (8325 one where recommended alone applied. Composite Soil samples also collected before after harvesting evaluate residual effect physiochemical properties. Accordingly, laboratory significance total N, available P, carbon CEC. post-harvest composite indicated OC, TN CEC compared initial sample. On other hand, partial budget done economically optimum integrated net benefit (126527 Eth. Birr recorded (4.6t/ha) plus 150kg/ha fertilizers marginal return (146) same treatment. Therefore, present enhanced productivity status area. Hence 4.6 t ha1 150 ha-1 improved properties, area similar agro-ecology.