I've done
enough of this stuff to know pros when I see them. Check this out
Ethiopia: The New Gondar
(no subs, those with short attention spans or tight budgets for time can feel free to skip around a bit. Skip to 2:45 to jump right in)
www.youtube.com/watch?v=5AavOJtcMWA
Watch them! The descend on the field like a flock of birds! Check out the flagging 20 minutes or so in.... I'm pretty sure they're flagging out alternate plantings and coordination and staging areas with various seeds types. I bet they even have runners for seed resupply. And that trick with the pop bottles? Killer