FROM THE outside it looks like a tall, metal-clad barn. But step in, through a large airlock designed to keep out the bugs, and a kaleidoscopic scene emerges. A central aisle is flanked by two pairs ...

For decades, moldboard plows, disks and field cultivators, all horizontal tillage tools, have been the go-tos for fieldwork. That’s changing as fears about climate change come into focus. Sooner or ...