Nothing says dull like a flat mono colored gaming table But it doesn't take much to change all that. Every real battlefield has a varying amount of trees, woodland, hills, rivers, roads, ponds, fences, walls, houses and so forth. The list is a long one but don't be daunted by it. Making your own terrain can be fun and a welcome break from painting those little men.
Corduroy is perfect for plowed fields. Cut out the desired shape and simply glue it ( I use hot glue) to a base. Something as simple as cardboard. Add a perimeter of stonewalls or fences, a little foliage and you've got a nice little field.
Teddy bear fur works well as an open green field and really helps to break up the table.
Again I just glue it to a base, cardboard was used here and then add the finishing touches of fence and foilage.