Dryland seed won't grow.

So we cleared over 6 acres of land here in SW Idaho, and we had our soil tested, and it came back Neutral and was a solid 7. Besides not having a good organic count, we talked to the NCRs and USDA plus a seed vendor, and we'll have $400 of dryland seed that failed to germinate. Any clues what went wrong, we followed the directions to the T.