AEC research and development reports. PNE-228P. Plowshare, peaceful uses for nuclear explosives, Plowshare program, Project Sedan, Nevada test site, July 6, 1962, final report: preliminary report: Close-in effects of underground nuclear detonation on vegetation, 1, Immediate effects of cratering, throw-out, and blast [with list of references; by] W. E. Martin.