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First-season growth of red alder seedlings under gradients in solar radiation


, : First-season growth of red alder seedlings under gradients in solar radiation.

Red alder (Alnus rubra Bong.) seedlings were grown on mineral soil near the Oregon coast under a conifer stand thinned to provide gradients in canopy density. first-season survival was one seedling per 31 viable seeds sown, indicating a low efficiency for alder establishment compared with conifers under similar conditions. Only a small part of variation in growth was assoicated with radiation reaching the forest floor.

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