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Southeast Colorado | We cut several thousand acres with a 1680.....and then a 2388. But haven't grown them in over a decade now.
Things I remember......we covered all of our back cleaning grates up. If the yield was sub 1000 lbs acre we'd sometimes even cover some of our front concaves up. As many as half of the concave area even. If they've gotten plenty dry..........it really helped to try and run during humid, almost wet weather. The goal was to get the heads to go through the machine and come out as whole as possible. Any breaking up of them just WAY overloads your sieves. Run your rotor speed about as low as you can get it. And the fan can actually be lowered a little from max. I honestly don't remember our fan setting (perhaps 800 or so??)...........but I know for every other grain crop we grow it's just run the fan as fast as you can get by..........since those machines don't have enough air to blow grain out. With sunflowers.........you actually could blow them out the back.
And like a lot of crops.............the better the yield..........the cleaner and easier it is to harvest. Sorry yielding flowers were just really hard to clean up. I think the worst we ever cut were around 400 lbs/ac. Got to cut 2000 lb+ flowers a couple of times. That was much more fun.
Edited by tmrand 10/19/2025 20:39
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Sun flowers
