Self-Fertility of a Central Oregon Source of Ponderosa Pine (Classic Reprint)

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Excerpt from Self-Fertility of a Central Oregon Source of Ponderosa PineGermination tests were conducted using seeds with full-sized embryos (i. E. Seeds with embryos greater than three quarters the length of the embryo cavity). Except for five families which had too few seeds, 100-seed lots were germinated in a commercial germinator at 30° C. Day temperature and 20° C. Night temperature with 12-hour photoperiods and thermo periods. Prior to germination, seeds were stratified for 3 weeks at 5° C. The germination test was discontinued when no germination had occurred for a period of 1 week.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.