This study examines the question of whether or not the technology of bullock traction has spread in northern Ghana between 1982/83 and 1993/94 and, furthermore, what factors determine changes in the pattern of the adoption of bullock traction in this area. The introduction to the problem and the objectives of the study in chapter one are followed by a theoretical section in chapter two that focuses on the question why one would have expected a further spread of bullock traction. This chapter explains the direct benefits of bullock traction and reviews the current state of knowledge of this issue. Factors that might have resulted in changes in these direct benefits of bullock traction between 1982/83 and 1993/94 such as population growth and the effects of structural adjustment programs are discussed. Additionally, the implications of the life-cycle of households and the tradition of the inheritance of cattle for changes related to bullock traction adoption over time are identified. Chapter three introduces the empirical data collection procedure and methods. The study is a follow up study to the study of Panin (1988) who conducted research on the same farm-households in 1982/83, in three villages of the Northern Region of Ghana. Chapter four presents the empirical findings about the changes in the socio-economic conditions that are relevant for bullock traction adoption in the study villages. These data extend the information in chapter two to the village level. The empirical findings about changes in the effects of bullock traction at the field level are presented in chapter five. The analysis includes the effects of bullock traction on land use, household labor utilization, performance of crop production, and aspects of bullock traction renting. The effects of bullock traction at the farm-household level were addressed in chapter six. It is necessary to separate the analysis at the field level from the farm-household level analysis because farmers combine different tillage technologies at the farm-household level. This chapter includes changes over time regarding household demographics, resource endowment, farm labor allocation, crop production performance, income statements, and the costs and benefits of an investment in bullock traction. Chapter seven of this study is concerned with the question of whether the changes in the bullock ownership pattern for the sampled households are in line with general trends at village level. For this purpose, the village census of 1994 was compared with 1982 and the result is that the ownership of bullocks and implements has declined which means that the results of the analysis at farm-household level is in line with general trends at village level. Although individual ownership of bullock traction declined, the area plowed by bullocks in the study area increased because renting of bullock traction services increased. Chapter eight of the study discusses important empirical results of chapters four to seven in light of the arguments made in the theoretical chapter two and draws attention to the conclusions of the empirical results. Important points discussed in chapter eight are: methodological issues, the labor-saving effect of bullock traction that is maintained over the years, the effect on crop yields that was found to exist in 1982 but not in 1994, the importance of the life-cycle of households to understand changes in bullock traction adoption at farm-household level, and the effects of structural adjustment programs on the adoption of bullock traction. The study ends with the formulation of recommendations for agricultural extension and further agricultural research. About the Author