Heights of selected ponderosa pine seedlings during 20 years

R. Z. Callaham; J. W. Duffield

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Heights of selected ponderosa pine seedlings during 20 years

Informally Refereed

Authors:

R. Z. Callaham, J. W. Duffield

Year:

1963

Type:

Miscellaneous Publication

Station:

Pacific Southwest Research Station

Source:

In: Forest Genetics Workshop Proc. 1962 10-13 (So. Forest Tree Improve. Com. Pub 22 Macon GA): p. 1-4

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Abstract

Many silviculturists and geneticists, concerned with the problem of increasing the rate of production of forest plantations, advocate or practice the selection of the larger seedlings in the nursery bed. Such selection implies a hypothesis that size of seedlings is positively correlated with size of the same plants at some more advanced age. Two tests were established at the Institute of Forest Genetics to determine whether seedlings selected as tallest within one-parent progenies maintain a growth superiority.

Citation

Callaham, R. Z. ; Duffield, J. W. 1963. Heights of selected ponderosa pine seedlings during 20 years. In: Forest Genetics Workshop Proc. 1962 10-13 (So. Forest Tree Improve. Com. Pub 22 Macon GA): p. 1-4