11. Dormant seeding means putting the seed into cold or frozen soil in late fall and leaving it until spring. 12. The frozen soil and permafrost hosts many microbial communities that are tolerant of anoxic, acid, saline and cold conditions. 13. Seeds have been shown to survive in frozen soil of temperatures as low as, attesting to their aptitude as overwintering structures. 14. A frozen soil barrier is being constructed in order to prevent ongoing exposure of running groundwater with melted down nuclear fuel. 15. Preserved in the frozen soil of Alaska are clues to an unknown land, where muskoxen and wild horses roarmed alongside woolly mammoths. 16. In Iowa, frozen soils and shallow water tables and bedrock rule out burials in about 40 percent of the state, Glanville said. 17. In spring thaw, the ground thaws from the top down, so water is trapped between the pavement above and the still-frozen soil underneath. 18. Although there are still environmental suits pending that could interrupt the work, the first pilings have already been driven into the frozen soil . 19. Cathole trowels are used by ruled sides to measure for proper cathole depth or jagged edges for cutting through roots or frozen soil . 20. However, even they could become stuck in swamp mud in the Kalguty river valley, especially after a sunny day when frozen soil begins thawing.
