Figure 40.— Reclaimed land covered by grasses In their third growing season at the West Decker mine in Montana. Mining 

 operations are continuing in the right background. August 1978. 



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Wall, M. K., and Freeman, P. G., 1973, Ecology of some mined 

 areas in North Dakota, in Wall, M. K., ed.. Some environ- 

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 Dakota Geological Survey Educational Series 5, 

 p. 25-47. 



Wall, M. K., and Kollman, A. L, 1977, Ecology and mining or 

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 use of disturbed land in the southwest: Tucson, The Uni- 

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Wyatt, J. W., Dollhopf, F. J., and Schafer, W. M., 1980, Root 

 distribution in 1- to 48-year-old strip-mine spoils in 

 southeastern Montana: Journal of Range Management, 

 V.33, no.2, p. 101-104. 



Williams, S. E., and Aldon, E. F., 1976, Endomycorrhizal asso- 

 ciations of some arid zone shrubs: The Southwestern 

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Zak, B., 1975, Mycorrhizae and container seedlings, in 23d 

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55 



