There are many kind of ground baits which you can use to attract Carps and I would love to share some of them here.
2 part soil from the side of Lake.
1 part ground 'oil cake" preferably rosted.
1 part bread crumb
1/2 liter sugar syrup.
Add 1 part cake crumb to the above.
Ghee residue mixed with mud. (The above two are feed based and this one is smell based.)
Beaten rice (Pooha) soaked over night mixed with mud.
Cooked rice (Keep it in a box for two or three days so as it is fermented). You can use it directly or mixed with mud.
You have to identify the place where to ground bait with some care and persist with a mix.
Best of luck.