The Commissioner of Agriculture and Commerce is hereby authorized at his discretion, and when the funds are available to construct or lease, operate and maintain warehouses to be utilized as a storage place for lime to be used for agricultural purposes. Said warehouses shall be located in the area of the state commonly referred to as the "Mississippi Delta." The Commissioner of Agriculture and Commerce is further authorized and directed to operate said lime warehouses in such a way as to provide adequate amounts of lime needed for agricultural purposes.