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Evaluation of Clone-Nitrogen Interactions in Populus Deltoides

Cottonwood (Populus deltoides Bartr.) growth response to three levels of fertilizer nitrogen was nonsignificant for nine cottonwood clones (three good, three average, three poor growers) evaluated on a Convent soil in a greenhouse study. Clone differences were significant for some growth characters and foliar nutrient levels. Clone X nitrogen interaction was nonsignificant. For 8 of 15 characters measured, the good clone class was significantly better than the poor clone class. Only for leaf weight and foliar nitrogen did nitrogen variance exceed clonal variance. Results of this greenhouse study do not support known nitrogen response from the same soil under field conditions. Thus greenhouse results must be viewed with caution and field tests undertaken prior to nutrient and clonal recommendations.

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Author(s): William K. Randall, B. G. Blackmon

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1977

Section: Session 5: Miscellaneous