I have made a mod for ploughed fields in snowy conditions that produces much less annoying moiré patterns. The ploughed fields ground texture is also used for some of the crop fields. Here is an overview what it looks like under sunny conditions (click and enhance to expand for a closer view):
The mod is the same for Final Blitzkrieg and Red Thunder but I made separate folders for convenience. Note that there is a separate one for Fortress Italy.