District play for Iowa high school softball begins next week. Here are the matchups for area teams: Class 1A, Region 4 Nashua-­Plainfield travels Monday, July 3, for a 5:30 p.m. first-round game against host Dunkerton. The winner will play Clarksville on the Indians’ home field at 7 p.m. Wednesday, July 5. The Huskies could face…