Which factor is the primary determinant of the accuracy of yield map data?

The primary determinant of the accuracy of yield map data is the monitor's maintenance and calibration. This is crucial because the yield monitor is the device that collects and processes data on crop yield during harvesting. If the monitor is not properly maintained or calibrated, it can lead to inaccuracies in the data it gathers, such as incorrect yield estimates.

Calibration ensures that the monitor is appropriately adjusted to account for specific factors that can affect yield measurements, such as variations in crop flow, moisture content, and harvest speed. Regular maintenance helps to keep the monitor functioning correctly and can prevent issues that may lead to faulty data collection. Therefore, without accurate calibration and proper maintenance, even the best yield monitoring technology can provide misleading data, making this aspect the most significant factor affecting the accuracy of yield map data.