You can watch a squall come across the flat from the north here, a gray wall over the hedgerows, and know roughly how long you have. Northern Edge Land Management works ahead of that clock — plowing drives and yards, opening walkways, laying salt where a slope and a shadow conspire. In the green half of the year the same acreage gets mowed and trimmed, borders cut in, and the cleanup hauled off in spring and again once the leaves come down. Land management out here means knowing which corners hold water, which fence lines eat a trimmer line, and which driveway drifts first. Kimball Township, Port Huron Township and the country between.