On: Agricultural drones are transforming rice farming ...

[blackoil]

Vietnam has lot of terrace farms done on side of hills. Maybe land vehicles aren't optimized for them.

[infecto → blackoil]

Definitely not, unless you are in the highlands its all pretty flat. Most of the farming is happening in very flat land.

[freddie_mercury → blackoil]

Not really. We have a very small minority of them in picturesque areas that are extremely poor because making rice terraces is a last resort thing in poor farming areas.

The overwhelming majority of the rice comes from the Mekong and Red River Deltas which are, like all deltas, extremely flat.