John, 7 bushels is a lot. There isn't just one reason why corn might be on the ground after the combine passes through. after all the years and thousands of hours I have been operating and working on combines I am still amazed at how all of that material can go into the front of a combine and be sorted out and separated in just a few seconds. Corn and soybeans, in fact all large grains are easy to separate, It's when we get into the heavy yielding small grains where I just can't get over the miracle that happens inside that machine.
With corn if the ear doesn't shell real easy and the stripper plates are set at the proper distance apart you should see almost no kernals on the ground behind the corn head and only a few broken kernals behind the combine. The corn head pulls the stalk down between the stripper plates very violently, so fast usually the human eye can't see it go down. When the stalk is on the way down the ear hits the stripper plates and being too big to big to make it through the strippers the ear is pulled off the stalk violently again. This might shell some kernals off the butt of the ear. Some of those kernals end up in the combine but some of the kernals go on down to the ground. The corn plants can vary in size and strength across the field. If there is a sandy place in the field the stalks and ears might be smaller in that sand. The ears might go right on down between the stripper plates and end up being ground up in the stalk rolls and sprayed down on the ground. This is why we see more volunteer corn in some areas of the field and no volunteer corn in other areas. If the corn has been blown over by the wind we will see tons of volunteer corn from plants the corn head cannot pick up. Those clumps of volunteer corn in George's picture might be from stalks knocked over by animals at the edge of the field or the corn might have been down in that area or the ear might have dropped off the stalk before the combine went through. The reason we see the volunteer corn growing in this picture is because the stalks were disked and the kernals incorporated into the soil. If the stalks are left alone in the fall we won't see volunteer corn until spring.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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