A study was made of the relationships between 7· to 8.year survival and yield of two broadleaved and five coniferous species and a number of selected chemical characteristics of Iowa coal.spoil materials.

The objectives were: (1) to determine if survival and yield of these tree species are related to the chemical characteristics of the spoils, (2) to identify those spoil chemicals most closely related to survival and yield of each of the tree species tested and (3) to provide this information to permit formulation of hypotheses for future controlled experiments.