Here is a simple recipe how to grow tomatoes with zero effort.
1. Feed chickens with some (spoiled?) tomatoes.
2. Do all the procedures needed by a composting chicken tractor.
3. When there is a ready final heap just leave it alone. No watering, weeding, fertilizing, pruning.
The tomato seeds will survive composting. They will sprout when conditions are good for them. I left this heap in the end of May. Tomatoes sprouted in July and were ripe by the end of September.
They taste delicious, though their skins are tougher then of good varieties.
Most likely this was a way of natives to grow tomatoes.
Retrospectively, it would be a good idea to put a trellis around the heap and probably do some pruning.