Yield maps can be viewed as both the entrance and the final exam for precision agriculture: as an entrance exam because they
can be used to determine if there is enough variability to justify the use of precision agriculture; as a final exam because they can
subsequently be used to determine if the investment in precision agriculture was worthwhile. By incorporating production costs,
yield maps can be converted to profit maps which provide a vivid image of the least and most profitable areas in the field. Managing
these areas individually will typically result in higher overall profitability. Yield maps are created from data collected by a yield
monitor – a sensor – or group of sensors – installed on harvesting equipment that dynamically measure spatial yield variability.