Michigan’s $100-billion-a-year food and agriculture industry faces a crossroads. For decades, the system was steady. Farmers grew crops. Hispanic workers from places like Texas and Florida migrated here every summer to pick and harvest, then left before the first frost. Over the past few decades, though, new programs and support for migrants mean many workers aren’t staying in that system. In the first part of our series on the topic, we look at just where many of those workers are going.