Bl**dy fantastic! I love the grass/wheat caught in the tracks, very realistic.
I agree about being able to do a whole wheat field, it'll take ages, and be difficult. Try going for a normal 'rough grass' look, in patches, with bunches of scrub weed etc, and larger areas of tall grass, as you would see on a virgin plain. The mix of colours and textures will work very well, and not only compliment the camouflage on the tank, but should look brilliant. I should have some pics of the type of terrain I mean, in the Kursk area, if you need them.