Deconvolution of site-specific yield measurements to address peanut combine dynamics

During the development of a peanut yield monitoring system, experiments wer e conducted on a two-row peanut combine to determine the duration of time l ag between pickup and yield measurement, and to characterize the convolutio n of peanut flow within the combine. The research indicates that the two-ro w peanut combine used in the experiment subjects harvested product to signi ficant convolution. A simple time lag correction will not recover the site specific (short term accuracy) of yield measurements. The distance and time period required to achieve a yield estimate error less than 20% (95% confi dence) is greater than 19.7 m (17 s) for simple time lag correction while i t is 5.8 m (5 s) for deconvoluted data. The net result is that smaller regi ons of yield variability may be recognized with greater confidence using th e deconvolution method than with the simple time delay method.