I plant my corn at 29,628 plants per acre according to the book in 30" rows. That gives me a spacing of 7" between each plant. Every 2,000 plants per acre changes the spacing by about 1/2". So 32,000 plants per acre gives me a spacing of about 6.5" between plants. 34,000 plants per acre spaces corn about 6" apart in 30" rows. Almost everyone around me plants 34-38,000 plants per acre cause they think more plants equals more yield, but its pure foolishness. I think it means unhealthy plants, puny cobs, small kernels, weak stalks, and premature death of their plants.
I DO NOT want multiple ears. I want one healthy ear, even spacing, even height and corn plants that are still alive with good ear retention at black layer. I see some hybrids throw multiple ears, but eventually the primary ear will cannibalize it and only the primary ear is worth something. The only places that I see two ears are places where the population was too low and the remaining stand is trying to make up for its missing neighbors. For me this is usually along woods were deer and coons thin the stand or on headlands where the sprayer or topdress buggy runs down corn and the population is lowered.
You will get the most out of modern corn with ONLY one ear per plant. The healthier the plant the bigger the ear. The ears in this picture from a few days ago average about 15 oz each. Those are some phenomenal ear weights. If you are seeing doubles and triples when the corn is mature you didnt plant heavy enough or your stand was thinned down by animals.
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