The term 'CERTAIN FARMER' is a job description for a TENANT farmer, which is someone who rents land from a landlord in exchange for a portion of the crops they produce. This type of farming has been around for centuries and is still practiced today. TENANT farmers are responsible for all aspects of farming, including planting, harvesting, and maintaining the land. They also have to pay rent to the landlord, usually in the form of a share of the crops they produce.