A Practical Look at Christmas Tree Improvement in Pennsylvania
In 1961 the collection of plant materials for the establishment of a 10 clone 500 tree seed orchard was established. After 17 years the results are still questionable.
Download this file:
![PDF document PDF document](https://npn.rngr.net/pdf.png)
Details
Author(s): Richard C. Bedger
Publication: Tree Improvement and Genetics - Northeastern Forest Tree Improvement Conference - 1978