With the dry fall, he thinks 80 percent of the acres in his area that were prevent-planted those years now have been clipped, burned or worked, in anticipation of planting in 2012.Mathews and Stein wonder whether RCIS employed the rule the same in North Dakota as in other states, such as Nebraska. ???I think we were the ???test case,??? just being tested in southeast North Dakota,??? Mathews says.