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Results show with decreasing yield caused by increasing charcoal rot there is a decline in the number of pods produced and thus a decline in seed numbers and grain weight (yield). There are smaller effects on plant height and the number of live plants that produced seed. There were not any significant effects on the number of seed per pod or seed weight (test weight). The single most important plant effect on grain yield, then, was the ability of the plant to retain pods under drought stress caused by charcoal rot plugging water conducting tissue (xylem) and decreasing the overall plant health.