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Conventional extension system in Tanzania has recorded limited success in improving agricultural productivity including maize production in the country. The Agricultural Innovation System (AIS) approach in extension service delivery deemed desirable in addressing the challenge. However little is known about the factors influencing delivery of extension service by using AIS. A study was conducted in Morogoro and Dodoma Regions to investigate the identified gap. A cross sectional research design was used to collect data from 345 respondents randomly selected from a population of various actors involved in the maize value chain. Key informant interviews and Focus group discussions were also used in data collection. Observations were used to supplement the collected information. The collected quantitative data were analyzed by using the Statistical Package for Social Science computer program while content analysis was used to analyze the qualitative data. The study findings show that factors influencing performance of extension service delivery include Extension staffs’ inadequate knowledge and skills on providing advice by using Agricultural Innovation System. Others were availability, affordability, efficiency, relevance and costs of extension service delivery. Based on the study findings it is concluded that despite the relevance of AIS over conventional extension system, there are a number of factors influencing delivery of extension service using AIS that might in turn bring effect on maize production the study areas. It is therefore recommended that negative factors should be addressed for effective performance of the system to improve maize production. Keywords: Extension service delivery, Agricultural Innovation System approach (AIS), Maize production

Factors influencing extension service delivery in maize production by using agricultural innovation system in Morogoro and Dodoma Regions, Tanzania