Copyright © 2022, Los Angeles Times | | | | The notice on Facebook was small and nondescript: “Free potatoes donated by Washington Potato Growers.” But that’s all it took.Last Wednesday, the giveaway caused a massive traffic jam in Ritzville, a tiny eastern Washington farming town.Farmer Marvin Wollman had filled a tractor-trailer with 40,000 pounds of russet potatoes packed into 15-pound bags, and they were gone in nearly three hours.The next day, Wollman brought another 40,000-pound load to the city of Moses Lake, and the line of cars stretched 2½ miles. Wollman was moved by the response,...…Copyright © 2022, Los Angeles Times | | | | The notice on Facebook was small and nondescript: “Free potatoes donated by Washington Potato Growers.” But that’s all it took.Last Wednesday, the giveaway caused a massive traffic jam in Ritzville, a tiny eastern Washington farming town.Farmer Marvin Wollman had filled a tractor-trailer with 40,000 pounds of russet potatoes packed into 15-pound bags, and they were gone in nearly three hours.The next day, Wollman brought another 40,000-pound load to the city of Moses Lake, and the line of cars stretched 2½ miles. Wollman was moved by the response,...WW…