This district is intended to protect a vigorous agricultural industry by limiting the areas in which the RR Rural Residential District can be used. The RR Rural Residential District, where permitted, shall generally be located where provisions can be made to adequately handle sewage disposal, where the value of the land for agricultural use is marginal, and where the water supply, roads, and emergency services are easily and economically available. This district shall also coincide with the purpose of § 155.003.