Ohio Agronomy Guide 15th Edition, Bulletin 472. The newly revised Ohio Agronomy Guide serves as the official compilation of adaptive results and recommendations from research and educational programs. Described in this manual is information on Ohio's climate and soil, soil and water management, soil fertility, and corn, small grain, and forage crop production and management. Also, seed evaluation and weed control for the previously listed crops are discussed. Three new chapters have been added: “Considerations for Using Cover Crops” (Chapter 10), “Conducting On-Farm Research” (Chapter 11), and “Precision Agriculture” (Chapter 12).