(AREA) -- Thumb area farmers are busy in the fields harvesting sugar beets. Motorists are noticing the heavier volume of semi trucks on the roadways along with their muddy tracks. According to Ray VanDriessche, Director of Government and Community Relations for Michigan Sugar, field conditions are better than ever. Sugar beet harvest sticks to a prescribed schedule set by the Michigan Sugar Company. Member growers are assigned specific time frames to deliver their sugar beets to the Thumb's four production plants in Sebewaing, Caro, Croswell and Bay City. Growers get the beets to the company's fifteen outlying piling grounds, saving transportation costs and helping Michigan Sugar moderate their flow to the four plants. Reports say the harvest is approximately 80 percent complete and should wrap up within the coming week. The total production capacity is approaching 4 million tons. Recently, Governor Rick Snyder visited Michigan Sugar's headquarters in Bay City, putting the spotlight on one of the arms the state's diverse agriculture industry.