Determining Yield Monitoring System Delay Time with Geostatistical and Data Segmentation Approaches
2002
Chung, S. O. | Sudduth, Kenneth A. | Drummond, S. T.
In combine harvesting, knowledge of the delay time from cutting the crop to sensing the grain flow is required for accurate spatial location of grain yield data. Currently, either an assumed, fixed delay time is used or the delay time is determined by visual inspection of yield maps. Geostatistical and data segmentation methods were developed to estimate yield monitoring system delay time using objective criteria. The methods were validated with an ideal dataset and with elevation and soil electrical conductivity datasets having known delay times. When applied to yield and moisture content measurements collected with a commercial yield monitoring system, the methods successfully estimated delay time. In most cases, the results agreed ( ± 1 s) with results achieved using a visual method. Grain yield and grain moisture content exhibited different delay times at different locations within test fields. Thus, it may be appropriate to apply delay time corrections to homogeneous sub-field areas, instead of on a whole-field basis. Use of these new estimation methods could allow for more accurate and efficient processing of yield monitor data.
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