S.D. Codified Laws § 21-47-24
At the expiration of the time for the redemption of such mortgaged premises, if the same is not redeemed, the person or officer making the sale, or his successor in office, or other person appointed by the court, must make to the purchaser or purchasers, their heirs or assigns, or to any person acquiring the title of such purchaser, by redemption or otherwise, a deed or deeds to such premises which shall vest in the purchaser, or other party entitled thereto, the same estate that was vested in the mortgagor at the time of the execution and delivery of the mortgage, or at any time thereafter; and such deed shall be as valid as if executed by the mortgagor and mortgagee, and shall be a complete bar against each of them, and against all the parties to the action in which the judgment for such sale was rendered, and against their heirs respectively, and all persons claiming under such heirs. Whenever crops have been sown on the mortgaged premises, before the issuance of a sheriff's deed, the mortgagor shall be entitled to the crops grown thereon and the right to enter on the premises to harvest the crops after the issuance of the deed.
SDCL 21-47-24