Lots of things are heavy on the farm.
A sow weighs approximately 200-300kg.
A straw bale weighs approximately 250kg.
A silage bale weighs approximately 600kg.
A cow weighs approximately 650kg.
A bull weighs approximately 900kg.
A modern tractor weighs approximately 5000kg.
A combine harvester weighs approximately 10,000kg.
There are lots of heavy objects on the farm!