(appellate review of agency decision; plaintiff held crop insurance policy for potatoes; policy covered potato rot if it reached compensable levels; adjuster did zig-zag sampling of stored potatoes which showed some rot, but not enough for insurance coverage; some potato juice was under piles and plaintiff requested adjuster revise sampling method, but he refused; plaintiff appealed denial of claim and hearing officer determined sampling was incorrect and ruled for plaintiff; deputy director overturned hearing officer finding there was insufficient evidence of sampling error; trial court upheld agency decision as did court of appeals; dissent stated director’s review was based on improper standard of review and matter should have been remanded for proper review).