I first came across this approach some thirty years ago with a chap who was using cross polymers to slowly absorb moisture after a seed ball landed on the ground.
This appears to be a variation on the theme. All involve firing a three inch ball onto the ground that provides a temporary ideal growing media allowing the seed to sprout. Here they also entertain a canister that carries a packed and sprouted seedling to be effectively shot into the ground. I would like to see combinations used.
A targeted seedling could lay out an effective grid of commercially valuable trees while random seed balls can deliver a natural distribution of tree types.
Aerial Seed Bombers Can Plant An Entire Forest Of 1,000,000 Trees A Day