I would trust a study done by PAMI before anyone else. That howardgroupinc study doesn’t even make sense and should make everyone ask questions. No way one hose on a Bourgault can be that far out unless it was pinched or partially plugged. If that was the case you would see all kinds of stripping in a crop not to mention other PAMI studies 15 plus years ago that didn’t show any kind of unreasonable CV.howardgroupinc.com or search accurate metering but poor distribution
We run Agtron blockage on both drills and although it’s far from perfect for counting flow in runs I would say the 11% CV that PAMI published is about what we see with blockage monitors.