On Midwest Permaculture's ning, someone has posted about what they call "Speedy Seedballs
"--trying a method quicker than individually rolling countless little balls. Sounds promising. This was just posted this morning; check the link to see if discussion has occurred. Here's the recipe:
1. Mix the seed, clay, and garden soil in the prescribed amount.
2. Wet the mixture with a ratio of 2:1 soil mix to water - this will make a thick, heavy mud that is somewhat shiny.
3. On a sheet of cardboard, spread the mixture around and press it down to the desired thickness.
4. Wait for the mixture to dry a little bit. It's about ready when enough water has evaporated that the mud is no longer shiny. This won't take too long, because the cardboard will absorb a lot of the water.
5. Using a machete, knife, or some other hard edge, cut the mixture in a grid. The cuts don't need to be deep, maybe half the depth of the mixture. Make the size of each square the same as the depth. If the mud sticks to your cutting edge, stop and wait for it to dry a little longer.
6. Let the mixture dry some more, then break the mud into cubes. The mixture shouldn't be completely dry, because the cubes will become brittle, but the cubes should be dry enough to retain their shape when you pull them apart.
7. Let the cubes finish drying, then scatter them around.
This makes the process of making the seedballs much quicker, because you don't need to pay individual attention to each ball. Also, since the "balls" aren't round, they tend to stay near to where they land, instead of rolling down and collecting in shallow places. If you carry them around in a bucket, the corners of the cubes will tend to break off, leaving you with a "seed dust" that can be scattered around or used in your next batch.
The size of the cubes can be varied depending on the size of the seed you want to sow - small cubes for small-seeded plants such as alfalfa, or larger balls for things like vetch or grains.