Abstract
Data from the Corn Ear Weight Study were used to analyze the forecast performance of models estimated using surface area and volune measurements to predict corn ear weight. Two models based on research measurements were compared to models estimated using the operational procedures from the Corn Objective Yield Survey. Research and operational models were estimated both within and across years using data from the 1986 and 1987 Michigan Corn Ear Weight Study. Results show that research models based on surface area and volune measurements have mean square errors that are 32 to 52 percent lower than models estimated using the operational procedure. The differences between forecast errors of the research and operational models are statistically significant.
Keywords
corn; objective yield; ear weight; volune; surface area; forecast error.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Recommended Citation
Bigsby, Fatu
(1989).
"FORECASTING CORN EAR WEIGHT USING SURFACE AREA AND VOLUME MEASUREMENTS: A PRELIMINARY REPORT,"
Conference on Applied Statistics in Agriculture.
https://doi.org/10.4148/2475-7772.1463
FORECASTING CORN EAR WEIGHT USING SURFACE AREA AND VOLUME MEASUREMENTS: A PRELIMINARY REPORT
Data from the Corn Ear Weight Study were used to analyze the forecast performance of models estimated using surface area and volune measurements to predict corn ear weight. Two models based on research measurements were compared to models estimated using the operational procedures from the Corn Objective Yield Survey. Research and operational models were estimated both within and across years using data from the 1986 and 1987 Michigan Corn Ear Weight Study. Results show that research models based on surface area and volune measurements have mean square errors that are 32 to 52 percent lower than models estimated using the operational procedure. The differences between forecast errors of the research and operational models are statistically significant.
