Warm, dry weather has helped spring fieldwork progress rapidly in the Dakotas and Minnesota. At least 81 percent of Minnesota's corn crop is in the ground -- one of the earliest planting seasons ever. In South Dakota, about 20 percent of the corn is in the ground...and the dry spring is allowing some South Dakota farmers into fields they haven't planted, for years. Minnesota Public Radio's Cara Hetland reports: There are high hopes out in the farm fields this season. Mild weather and dry soil are allowing some of the earliest planting on record. On Bob White's farm in eastern South Dakota the red tractor has been working overtime,