. Ecological investigations upon the germination and early growth of forest trees. Trees; Germination; Growth (Plants). 38 Richard H. Bocrkcr The Effect of Light upon Germination. Fig. I. The germination curves of Pbnis 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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