This helicopter was spraying either insecticide or fungicide on the soybean field just north of my home. We frequently have spray planes, but not helicopters. He lands on the truck, never shuts down, loads in 3 minutes and empty in 5. Farmers usually will wait until the insect population reaches a certain threshold to justify the expense of spraying. The hope spraying will increase or salvage grain yield from the bugs and hopefully more than pay for the spray and application.
Fungicides are a tad different, you have to treat the crop before the fungus is visibly present on the soybeans other wise its too late. Yes it's a crap shoot if the fungus does not show up, it's money wasted. Given the rain we've had in the last two weeks (almost 5 inches) I'm sure it will be money well spent this year.
This field is north of my house, and if you look real close, you can see the red and white striped pole marking Santa Clause's home.