Response of Douglas-fir & Ponderosa pine to phosphorus fertilization at the J. Herbert Stone Nursery


Twelve combinations of nitrogen and phosphorus fertilizers were applied in the first growing season to Douglas-fir and ponderosa pine seedlings. Soil analysis was done prior to sowing and after the second growing season. Foliar analysis was done at the end of the first growing season. Seedling height, caliper and shoot and root dry weight measurements were made at the end of the first and second growing seasons. Results indicated seedlings responded more to increased levels of phosphorus fertilization than to increased levels of nitrogen fertilization.
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Publication Forest Nursery Proceedings
Event Medford, OR - 1982
Author James W. Fischer
Published 1983/03/01
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