ronfromramer- yellow nutsedge = chufa

pcp- 007 mentioned a great option for you also with metsulfuron...good stuff. Here's a combo I use quite often:
.5 oz metsulfuron + half pint dicamba + 1 oz carfentrazone + NIS = if you have any broadleaf weed escapes, you better start praying.

Also, if nutsedge could be controlled with 2,4-D amine or atrazine...it wouldn't be one of the world's worst weeds. I wish I could control it with 2,4-D or atrazine for $2.50/A. I've never seen any nutsedge control out of either.

There are plenty of broadleaf brews you can concoct with atrazine, 2,4-D, dicamba, carfentrazone or metsulfuron that will do what you're looking for.

good luck
p.s.- fwiw, my perspective is one of trying to kill nutsedge 6-8 mths out of every year...not grow it.