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    Author(s): L. R. Auchmoody
    Date: 1974
    Source: Research Note NE-198. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.
    Publication Series: Research Note (RN)
    Station: Northeastern Research Station
    PDF: View PDF  (326.64 KB)

    Description

    Nitrogen (N) and phosphorus (P) concentrations in leaf blades and petioles obtained from three fertilized and three unfertilized yellow-poplar sample trees were determined annually during a 4-year period. Concentrations were substantially higher in blades than in petioles. Fertilization increased N and P concentrations in blades, but petioles showed only a slight increase in N and a decrease in P. Because blades were more responsive to changes in external nutrient supply than petioles, and because fertilization affected the composition of blades and whole leaves unequally, blades give a more sensitive and accurate measure of nutrient concentration than petioles or whole leaves.

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    Citation

    Auchmoody, L. R. 1974. Nutrient composition of blades, petioles, and whole leaves from fertilized and unfertilized yellow-poplar. Research Note NE-198. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.

    Keywords

    Foliar sampling material, Liriodendron tulipifera

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