Yield growth of different rice varieties and types have been assessed to highlight the trends and factors influencing output growths during the Bangladesh years. Contributions of component factors for rice output growths have been measured. Area expansion and variety substitution have been the main vehicles for increased rice output growth in the face of declining modern varieties' yield levels in Bangladesh. Real rice prices did not play a significant role in increasing yield levels. Yield augmentation for the rice varieties has been dependent on technological breakthrough in production.