General Soil Map of Nebraska (SM-4): Kuzila, M. S. (1:1,000,000; 1990), size 36" x 24". Description: The general soil map of Nebraska at a scale of one mile equals one-sixteenth of an inch offers an intermediate scale for general use. This map shows good detail yet is concise enough to be easily read. The map features a minimum of 80 soil associations in more than 30 colors. It is a good reference for researchers, students and resource planners.