From the experimental results, and compare the efficiency between the digging for the back of the people and digging machine cassava 100 square, it was found that the average time of people dig cassava as 300 minutes. Cost / day of 300 baht per person. Digging machine it takes an average of to dig it was 32.1 minutes cost / day of 500 baht. When used to compare the efficiency between people and machines dig cassava. The digging machine it is digging regularly than digging. Both also solve the labor shortage problem and reduce the fatigue from work. Calculation break-even found digging machine cassava to work of 15.2 farm, it is worth the investment