A Corn Objective Yield Survey is conducted monthly from August to November to forecast end-of-season yields for the major corn producing states in the US. This report will provide information on the types of data collected from the corn objective yield surveys and how they relate to the Agricultural Statistics Board yield estimates. The information is being provided to data users to aid in understanding the corn objective yield program and to provide a historical perspective of the changes in the number of plants per acre, ears per acre, and average row width indicated by the objective yield survey that have occurred in the objective yield data over the last 15 years.