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Soybean pod shattering and harvest moisture

Pre-harvest and harvest loss of grain can result in significant yield reductions. Pre-harvest pod shatter (breaking of pods resulting in soybeans on the ground) can occur when dry pods are re-wetted. This year, in our trials, we’ve seen very little pre-harvest loss.

At grain moisture content less than 13%, shatter loss at harvest can also occur. As soybean moisture decreases, shatter and harvest loss increase. In some of our trials, we’ve seen approximately 8% loss when harvesting at 9% moisture content. At 13% moisture content, we still see some loss, but at a much lower level (1-2%). Four soybean seeds per square foot equals one bushel per acre in loss. The seeds are often covered by soybean residue and chaff which need to be brushed away to look for seed losses.

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