(marital dissolution case; appellant ex-husband challenged district court’s division of marital property and award of child support, spousal maintenance, and attorney’s fees; appellate court affirmed in part, reversed in part, and remanded; trial court found husband’s share of family farm property was marital and found seven-acre parcel adjacent to family farm and deeded by parents was nonmarital property; appellate court held ex-husband failed to rebut presumption that farm acquired during marriage was not a gift and was marital property).