REARDAN, Wash. – From his perch in the combine, Joel Zwainz lowered the reel even closer to the ground. This patch of winter wheat, he said, is normally about 10 inches tall, and even cutting at 4 inches, he’s still not picking up most of the grain. “It’s no fun to harvest here,” he said. “It’s kind of hard because it’s so low. Right now, I’ve got my reel down as low as it’ll go, and if I take my header any lower, it’ll be digging dirt.”