Kyle Kurt fought to keep his emotions just below the surface as he talked about selling off his herd of Holstein dairy cows, which he's milked twice a day, 365 days a year, through good times and bad. Dairy farming has been Kurt's livelihood, and his passion, since he graduated from Lodi High School 18 years ago. But come Monday, he's having an auction to sell his cows, his milking equipment, his tractors and other farm machinery that he's spent years acquiring. “It’s probably the toughest decision I have ever had to make,” Kurt said, "but I have been told it's going to be a big weight lifted off my back."Scores of Wisconsin farmers are in a similar predicament. And with them, a way of life that has defined much of the state for more than a century and a half is disintegrating.