Abstract:Farmers' evaluation and analysis of the factors determining the adoption of improved farm technology are essential to elicit what varietals characteristics motivate farmers to adopt or reject improved varieties and the technology. The main objective of the study was to elicit farmers' criteria for selecting rice varieties and the factors determining adoption of NERICA varieties in the study areas. The data used for this study were collected from 600 farmers in Ekiti, Kaduna, Nassarawa, Ogun, Ondo, and Taraba States of Nigeria through farming household survey conducted from August to September 2009. The main instruments for data collection were well-structured questionnaires administered in each state. This study utilized descriptive statistics, such as means, frequency and percentages; and Tobit regression model were used to analyze the data collected. The results revealed that field days attendance was very low in the study areas and was similar across states; and this may limit their participation in exchange of ideas and in sharing of knowledge and experience of improved technology. The small farm size and subsequently low output could adversely affect rice production in the country and thus prevent the country from attaining self-sufficiency in rice production. Farmers grow an assortment of both local and improved rice varieties and the most important criteria across the states were high yield, tillering and logging resistance. There was progressive increase in the proportion of land given to NERICA rice cultivation since 2004. This suggests that there is increase in the adoption rate of NERICA varieties across states. Level of formal education, farm size, access to credit, rice income, farm income and level of awareness of NERICA varieties positively and significantly determined NERICA rice adoption. Base on these, we recommend that government should aim at policies geared towards providing incentives to encourage all stakeholders to improve productivity in rice production. Incentives, such as provision of micro credit and implementation of subsidy on inputs like fertilizer and seed, would go a long way in boosting rice production in the study area.