Loans made by a Farm Credit Bank to farmers, ranchers, and producers or harvesters of aquatic products may be for any agricultural or aquatic purpose and other credit needs of the applicant, including financing for basic processing and marketing directly related to the applicant’s operations and those of other eligible farmers, ranchers, and producers or harvesters of aquatic products, except that the operations of the applicant shall supply some portion of the total processing or marketing for which financing is extended.