Abstract
The application of precision agriculture to cotton ( Gossypium hirsutum L.) production has been limited due to the lack of a suitable yield monitor. Cotton yield monitors under research have utilized load cells, sound sensors and electro-optical devices to measure seedcotton yield. A commercial electro-optical cotton yield sensor was introduced to the cotton industry in 1997 by the Zycom Corporation, Bedford, MA. The purpose of this study was to evaluate the precision of this new yield monitor on small research plots. Cotton research plots were harvested and monitor values recorded from a single harvesting head. Seedcotton was saved from each plot and weighed for comparison with yield monitor values. Monitor values were compared to cumulative plot weights. A total of 226.8 kg of seedcotton was harvested from 72 plots. A significant linear relationship ( r 2 =0.99) was observed between monitor values and observed plot weights. This yield monitor looked very promising for estimating cotton yields and suggests that this technology may allow for the application of precision agriculture to cotton production.
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