Bird Seed in Compost?

bury it deeply enough that it won't be disturbed. many seeds will not be able to grow if they are buried deeply enough that they don't get enough warmth/sunlight and if any do happen to sprout they are down deep enough that they run out of energy before they can get to the surface.

this is a very good technique for a very weedy garden. dig a deep enough hole and scrape the surface into the hole and then bury it (i usually put some newspaper or cardboard over the worst of it at the bottom of the hole as that will also act as a barrier - but you have to be sure you are deep enough for this method to work as it would be a root barrier for several years to some garden crops).

songbird