Montana Agricultural Lien is a security interest given by a farmer or rancher to a lender in exchange for a loan. The lien secures the lender’s interest in the agricultural products or crops produced by the borrower. There are two types of Montana Agricultural Liens: a Grain Lien and a Livestock Lien. A Grain Lien is a lien placed on a crop or grain harvest in order to secure a loan. A Livestock Lien is a lien placed on livestock owned by the borrower in order to secure a loan. Both types of liens must be filed with the Montana Department of Agriculture in order for them to be valid.