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Effect of Water Table on Willows Grown in Amended Mine Tailing

^a Department of Forest, Rangeland, and Watershed Stewardship, Colorado State University, Fort Collins, CO 80523
^b Western Colorado Research Center, P.O. Box 598, Gunnison, CO 81230
^c Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO 80523

View larger version (51K): [in a new window]   Fig. 1. Schematic illustrating the greenhouse setup for one water table treatment.

View larger version (55K): [in a new window]   Fig. 2. Schematic of experimental units illustrating the four water table treatments (20, 40, 60 cm, and fluctuating). The fluctuating water table simulated the natural hydrograph in the field: May (40 cm), June and first half of July (20 cm), second half of July and first half of August (40 cm), and second half of August and first half of September (60 cm).

View larger version (24K): [in a new window]   Fig. 3. Manganese concentrations at different soil depths in amended mine tailing as affected by water table treatments and species of willow grown in the tailing. Water table treatments within a soil depth with different lowercase letters are significantly different at P 0.05 for a given willow species.

View larger version (74K): [in a new window]   Fig. 4. Manganese concentrations in leaf and stem tissue of two willow species grown in amended mine tailing as affected by water table treatments. Water table treatments within a willow species with different lowercase letters are significantly different at P 0.05 for a given tissue type.

View larger version (65K): [in a new window]   Fig. 5. Total manganese contained in leaves of two willow species grown in amended mine tailing as affected by water table treatments. Water table treatments within a willow species with different lowercase letters are significantly different at P 0.05.