Abstract: A method and apparatus for storing and accessing a large amount of hierarchally organized data obtained by a yield monitor for agricultural harvesters. Data can be collected for any number of fields, each containing any number of loads. After the data has been collected, any load data value or field total value can be displayed by first selecting either the field or load level of the hierarchy, and then moving between fields or loads using up and down arrow keys on a keypad. A data display is divided into multiple partitions, one for displaying the selected field number, or a selected load number within the selected field, and two other partitions for displaying data recorded or computed for the selected field or load. Additional keys associated with these displays allow selection of many alternate data values for each display partition.