Drilling mud comes dry in sacks. It is mixed in tanks or pits with water or oil to the specific needs of the drilling operation to lubricate the hole , bring up drill cuttings as it circulates and add weight to the drill pipe/column to maintain control of the operation. Additives go in once the mud is mixed. You can use it right out of the sack and pour it on the ground , spread it around and till it into the soil. Then wait for the rain.