This diorama is "N" scale,
The purpose of the display is to tell the story of the story of how grain produced goes from the farm to the world markets. Here we see a depiction of a farm with a combine harvesting wheat.
The wheat is then transported by truck or wagon to the local COOP where it is loaded into grain hoppers for transport to the big city terminal.
The big city terminal then loads the 110 car unit grain train for transport to the port.
The grain is loaded onto ships for the journey to foreign countries to be used in a variety of products.