Posted by don656 on April 09, 2012 at 11:08:46 from (75.179.137.24):
I have a Soybean Special 5100 grain drill. From what I can tell, what makes it a soybean special is that the normal 7-tooth grain feed shaft driven sprocket is replaced with a 14-tooth sprocket thus reducing the shaft speed by half. To plant 180,000 seeds/acre, and using the sprocket ratios, I calculate that each flute of the seed spool must drop 6 or 7 seeds at a time. So, why did IH do this for soybeans? Wouldn't it have been more accurate to keep the original 7-tooth sprocket and drop 3 seeds at a time, rather than 6 or 7 at a time? If I change back to the 7-tooth sprocket will I increase the accuracy or am I missing something?
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