Ohio State University did an 8 year study and found that 80% of all crop yield is determined by water management. What is water management? Water management would include drainage for wet soils, especially in wet years and irrigation for dry soils and dry years. Water management can also be influenced by tillage practices and soil amendments. Terre Max Farm’s goal is to make each acre as productive as possible. This may include drainage tile and irrigation in the same field. Drainage for the wet areas and irrigation for the dry areas.