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Corn Update
DR. ANTHONY OHMES
JACKSON, MO.
A quick check in front, under, and behind the combine during harvest will give an idea of preharvest, header ear and kernel, and combine losses. Combine harvest loss can range from 3 percent to 5 percent of crop yield. Anything higher, adjustments should be made.
First determine ear loss in 1/100 of an acre (435.6 square feet). One 0.75 pound ear or equivalent smaller ears equals 1 bushel per acre. Three 0.5 pound ears equals 2 bushel per acre. Header ear loss is determined by subtracting total ear loss behind combine from preharvest loss of unharvestable ears in front of combine. Second, determine kernel loss from header and combine by counting kernels in ten 1 square foot samples. Two kernels per square foot equals 1 bushel per acre. Combine loss is determined by subtracting header kernel loss from total kernel loss behind separator. ∆
DR. ANTHONY OHMES: Agronomy Specialist, University of Missouri Extension
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