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Uniform seedling density is important in hardwood progeny test nurseries

Efficient progeny testing is an important component of pine tree improvement programs. But, it may be even more important in hardwood improvement programs because the variability of natural stands of hardwoods complicates the process of phenotypic selection. In order for a progeny test to be efficient, either the environment must be held constant from one family to the next, or uncontrollable environmental variation must be accounted for by sound experimental design in the nursery and in field plantings. Usually, efforts are made to do both. Emphasis is placed on selecting uniform nursery beds for growing seedlings and on careful blocking in field plantings.


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Author(s): Charles D. Webb

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1969