| Summary: | The objectives were to induce and study the effects of adverse climatic conditions on sugar maple. Two different snow removal treatments were applied over the winter period of 1990-91 and a tarpaulin treatment was applied over the summer period of 1991 to a sugar maple stand in the Morgan Arboretum. The complete snow removal and tarpaulin treated trees showed decreased leaf water potential and increased peroxidase activity over the growing season. Foliar Ca was reduced in the two different snow removal treatments early in the growing season while foliar N was reduced in the complete snow removal trees late in the growing season. Soil NO$ sb3 sp-,$ K$ sp+$ and Mn$ sp{2+}$ was elevated in the complete and partial snow removal, and tarpaulin treatments at various times throughout the growing season. The snow removal treatments affected both water and nutrient status as well as tree health.
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