RELATIONSHIP BETWEEN SITE INDEX AND FOLIAGE NITROGEN AT TWO CROWN LEVELS FOR MATURE BLACK SPRUCE | Zendy

J. D. Gag | Zendy

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RELATIONSHIP BETWEEN SITE INDEX AND FOLIAGE NITROGEN AT TWO CROWN LEVELS FOR MATURE BLACK SPRUCE

Author(s) -

J. D. Gag

Publication year - 1964

Publication title -

the forestry chronicle

Language(s) - English

Resource type - Journals

eISSN - 1499-9315

pISSN - 0015-7546

DOI - 10.5558/tfc40169-2

Subject(s) - crown (dentistry) , black spruce , site index , growing season , nitrogen , horticulture , botany , biology , forestry , environmental science , chemistry , ecology , geography , taiga , medicine , dentistry , organic chemistry

The concentration of nitrogen in current year lateral needles of 122 mature dominant and codominant black spruce trees (Picea mariana Mill.) growing on different site qualities has been studied. Analyses carried out on needles collected at the end of the growing season and within two feet of both the top and base of the crown indicated that samples obtained from either position on the crown can be related to site index or site quality. It seems, therefore, that the concentration of nitrogen in needles from the lower branches is as good a criterion of growth or productivity as that in the needles from the upper branches.

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