How to get bermuda grass out of a raised bed
I have my raised asparagus bed laid our and sides already staked in. Because the area has never been tilled, we sprayed it twice with extra strength Roundup to kill the wild onions and bermuda grass. Today I tilled it, then raked to get as much of the bermuda grass out as possible, but there has to be millions of spikes still in the dirt. Now how do I get rid of all of them before tilling in the leaves and sand I plan to add to the existing dirt.