Popping into Wilko for something unrelated I spotted some door mats. Firstly a coir mat for £3.00 with a much thinner backing than my existing pieces, which therefore would avoid the need to cut down the backing before using it on figure bases. To make it more suitable for games I dry-brushed it with yellow. I cut for rectangle for use as fields and kept the rest for basing, etc.
There was also a "inside door mat" in a beige colour at only 88p and it seemed just the job for ploughed fields, this time I dry-brushed it brown. The results:
Fences are the old Airfix ones.