By  Lori Valigra (Bangor Daily News) and  Caitlin Looby  (Climate Central) with Jen Brady (Climate Central) contributing to data reporting Maire Lenihan coaxes organic Keuka Gold potatoes into a washing machine at Goranson Farm in Dresden on Wednesday, April 20, 2022. Credit: Troy R. Bennett / BDN Maine farmer Ryan Guerrette irrigated his 1,200 acres of potatoes in Caribou more often in the past few years, when more severe rain or drought conditions threatened the state’s premier food crop. Guerrette Farms is in the heart of Aroostook County in the northernmost part of Maine, which has the largest concentration of potato farms in the state. Farmers there produce most of the 56,000 of acres harvested in the state worth a total of $540 million in sales and employing 6,100 people. Most still dry farm without supplemental irrigation, putting them at risk of a drought such as the one in 2020 that decimated 30 percent of the state’s potato crop.…