So,if you sliced with a laser diagonal at the node of grass =====()==== or apical meristem of plant tissue it is much more likely to root if it lands on the soil.
If you also coat it with a film of rooting hormone for cuttings it is is even more likely to take root.
So, if you
had a lawn, and you wanted a lawnmower roomba to make it all rich and lush with new grass you would tell the lawn roomba to make diagonal splinter-cuts and spray rooting hormone on all the thatch it flings on the lawn.
So that is a new to me way to get a grass cutter to be a grass maker.
Mass automated tractors and planning are better, but I wonder if a rice paddy could go to humanless replanting if the automatic harvester left 11% of the rice, and the planting roomba did the diagonal on nodes/apical meristem (& rooting hormone) thing. Each remaining plant is comminuted and flung to make 11 new plants with a robot. All the humans have to do is eat the rice, if they feel like it.
Rooting hormone is water soluble, but it seems likely you could just make a sticky gel that persists even at water-rich rice culture.