
Abstract A test of pollen fertility after 3 years of cold storage is reported. Douglas-fir (Pseudotsuga menziesii) pollen was as fertile after 1, 2, or 3 years of storage in liquid nitrogen as was fresh pollen. Fertility of the same pollen lots decreased significantly after 1 or 2 years of storage at 0°C. For. Sci. 33(1):244-246.
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