. Ecological investigations upon the germination and early growth of forest trees. Trees; Germination; Growth (Plants). 42 Richard H. Bocrker The Effect of Light upon Germination. Fig. I. The germination curves of Pscndotsiiga (Wash.)-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Boerker, Richard Hans Douai, 1887-. Lincoln, Neb

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