Soybean producer Kip Cullers in SW Missouri has reported yields of 139 (2006), 155 (2007), and 160 bushel/acre (2010), and these yields are substantially greater than any other reported maximum yields. For the past 3 years, we have made measurements in Mr. Cullers' contest field with the intent of documenting crop growth characteristics that would result in these yields. While these observations have provided some hints of unique features of Mr. Cullers' crop, more detailed and more frequent measurements are required. We are proposing that a PhD student will characterize Mr. Cullers' production system. This research will provide unbiased documentation of Mr. Cullers' yield, establish crop...