As far as I can tell a lot (in agricultural areas) is shared between a few families - fields, animals, equipment etc.
We met an old lady who has the machine which separates the rice grains from the husks. Each farmer pays her according to the weight of rice processed - at 700 dong (about 4 cents) per kilo. To give some comparison, street food like bahn mi (salad roll) is around 20,000 dong ($1.10).
Poor old thing had lost the fingers on her right hand to the machine, and was about 80, but still working all day. Fortunately now the tour company pays her a bit to show foreigners how the rice is processed.
As far as looking after equipment, I reckon they're a country of motor mechanics - they must be good to keep the millions of scooters on the road!
We've been here for 2 weeks today, and fly back Tuesday (arriving Wednesday).