The present study has been conducted at Sakra and Muraul block of Muzaffarpur district of Bihar with objective to incorporate mini power tiller equipped with cultivator, ridge maker and potato digger among marginal and small land holding farmers. Use of mini power tiller reduced the cost and time of operations as compare to human and bullock pair involvement in farm activities. In compare to human, total cost saving for ploughing, ridge making and potato digging by mini power tiller was observed 97.76%, 93.59% and 97.44% respectively whereas, it was 24% (ploughing), 56.38% (ridge making) and 51.19% (potato digging) as compare to bullock pair. So, it can be suggested that low cost mini power tiller is a great alternative of high cost tractor and high time-consuming human and bullock drawn farm activities for small and marginal farmers.