Corn Quality Within the typical harvest moisture range, threshing is the likely cause for cracked kernels. Concave gaps narrower than e inch or thresher surface speeds above 3500 feet per minute can lower corn below USDA Grade No. 2 requirements. If adequate aeration is available in storage, corn kernel damage essentially determines the maximum allowable storage time. About 90 percent of the separation should occur at the thresher. Gentle threshing aids corn recovery on the walkers and sieve.
Corn carries out over the straw walkers or chaffer sieve if they become plugged with cobs.
Cleaning requires a high speed fan. Use the operator's manual for initial combine settings and fine-tune speed for field conditions. Separating losses and shelling at the stalk rolls are other common problems. Some producers may increase corn income by reducing field loss by several bushels per acre. Ears dropped before harvest 2.1 1.0 Total field loss 5.8 1.5 Back to top Estimating Field Loss Everyone wants to do an expert job of harvesting.