alt Hacker NewsSome crops seed very nicely by being broadcast, and most forages are seeded that way. Small seed crops like canola and grasses are perfect for broadcasting, and I've seen some excellent crops that were broadcast.
Fertilizer is a poor candidate for drones, because even an Agra 100 could barely lift an acre's worth of fertilizer, since you'll often seen upwards of 200lbs/ac applied each year.
They are good for fertiliser when you have areas to small for aircraft or too difficult for a tractor, which is not often but common enough for them to be useful.