The objective of the work was to verify the relationship between the experimental error and the variable observed in the time course of the experiment. With the results of the national competition experiments of maize cultivars, pathy analysis was used inside of each cycle, having as dependent variable the mean square of the error and as independent variables the other variables observed in the experiments, showing that the variables as weight of spikes, grain yield, height of the plant and insertion of the first spikes with more homogeneous values inside of each experiment, disregarding the cycle, provided a smaller value of the mean square of the error, improving the precision of the experiment.
experimental precision; pathy analysis; Zea mays
