Many years ago, many a farm had a narrow gauge railway for transport around the farm. For instance, many watercress farms had 18in gauge railways to bring the watercress from the beds to the bagging shed, the potato farms of Lincolnshire were served by eccentric 2ft gauge systems, and at Shillingstone pig farm there was a 10 1/4 inch gauge line to move pig feed. Most are gone now with the advent of more powerful tractors that can cope with very muddy ground (one of the main reasons for using railways was that trains do not get bogged down when the ground is very wet because the track spreads their weight). However, there are still a few about and even one or two new ones built this century.

This one, for example, a delightful little line built to shift horse dung and equine supplies, is in regular use at least twice a week. Traditional small narrow gauge with little diesels and a few grubby skips in tow chugging along track buried in the grass, is still a viable means of transport sometimes.

http://www.ingr.co.uk/sar_intro.html