AGRICULTURAL COMMODITY CONTRACTS A variety of contract choices, including fixed price contracts, minimum price contracts and deferred price contracts are offered to clients. Commodity products can be delivered to silos, directly to processors, or warehoused in farm storage. Producers can make use of Unigrain’s extensive farm loading service. Unigrain specialises in the farm-to-mill delivery concept. The farm-to-mill delivery concept is synonymous with the company and historically it has offered great benefits to clients.