Another hobby I dabble in is miniatures wargaming - specifically, 1:285 scale armored vehicles. A side part of this is making scenery hexes, which can be arranged and re-arranged to give many different configurations of a battlefield.
One of the types of terrain I've modeled is what is referred to a "Row Crop Hex". While I've done this with GHQ's Terrain Maker system, the techniques would apply to any kind of scenic modeling. The procedure goes something like this...
1. Using styrofoam as a base and a fairly dull #2 pencil as an engraver, draw a series of parallel lines 1/4" to 1/8" apart, pressing into the styrofoam as furrows.
2. Paint the entire area with the brown you're using as your earth color. Let dry.
3. Make up a thin wash using a dark brown paint, and wash the entire area; the dark brown wash will settle in the low places, adding depth. Let dry.
This is the time-consuming part...
4. Lay a bead of Elmer's White Glue in the a furrow; then use your choice of color and size (fine, medium, coarse, whatever) of ground turf, place bits of the ground cover in the glue line in the furrow. I find a dental pick is a wonderful tool to get the bits of foam exactly where you want them.
5. Move an inch or so to another furrow, and repeat Step 4. Theoretically, it possible to do the next row -- but I've never had too much success with that.
6. Repeat Steps 4 and 5 until you "can't take it no more"

then stop and let all the glue dry.
7. Repeat Steps 4-6 until the field is fully sown.
8. Give the field one final wash with a "white glue wash" -- basically a 50-50 mix of white glue and water, with a drop or two of liquid dishwashing detergent (to help break down surface tension). Once again, let dry.
It IS time-consuming -- but the final results are worth the effort!
Here is a link to my website's page on making Row Crop Hexes:
My website's page on making Row Crop Hexes
Hope you find this helpful!
Regards,
Tom Stockton
p.s. I don't have any model railroading stuff on my website yet... sorry!
