This research explores a possible reason for the inconsistent results from previous study on the profitability analysis in precision agriculture - different standards of identifying possible erroneous observations for PA datasets. By comparing the results from the different standards of identifying possible erroneous observations, this research raises concerns about the negative impacts of different standards of identifying possible erroneous observations on the profitability analysis of PA, and provides some suggestions for the standard which could be used in the future profitability analysis of PA.