Helicopters as planting helpers are sometimes necessary
The helicopter is the last solution even if no crane of any size reaches the planting site
Example here in Switzerland - An olive tree is to be planted on a vineyard

Olive tree is to be planted in the vineyard - Switzerland

Olive tree on the hook

Olive tree flies in

Helicopter stops to plant

Leveling the 1 ton olive tree is not easy

Immediately he sits in the planting hole when the wooden container is sawn free

All right - OK - tree sits, helicopter can fly again
Last hand on the vineyard in Switzerland