Forest Ecosystem Monitoring Cooperative(802) 656-0683femc@uvm.eduwww.uvm.edu/femc705 Spear StreetSouth BurlingtonVermont05403United States of AmericaFoliar Nitrogen Variability and Resorption During Autumn Leaf Senescence in Sugar MapleMeasure foliar nitrogen of sugar maple to determine relationships between leaf nitrogen content and resorption efficiency during autumn leaf senescence. To examine the variability in resorption efficiency among and within sugar maple trees. To establish a baseline for long-term nutrient cycling research. To examine the variability in resorption efficiency and foliar N content among and within sugar maple trees. To determine the relationship between resorption efficiency and foliar N content.Foliar Nitrogen Variability and Resorption During Autumn Leaf Senescence in Sugar MapleScherbatskoyTimLeonEvelineplant physiologyfoliar nitrogennutrient cyclingsugar mapleNitrogen Content of Sugar Maple Leaf Litter1993-09-271993-10-18Measurement of leaf litter weight and amount of nitrogen in 20 sample trees on certain daysTo determine relationships between leaf nitrogen content and resorption efficiency during autumn leaf senescence, examine the variability in resorption efficiency among and within sugar maple trees, and establish a baseline for long-term nutrient cycling research examine the variability in resorptioZ0015_SMLL_LitterVMC.15.16mySQLEveline Leon.1993. Nitrogen Content of Sugar Maple Leaf Litter. University of Vermont. FEMC. Can be found at: https://www.uvm.edu/femc/data/archive/project/foliar-nitrogen-variability-resorption-during-autumn/dataset/nitrogen-content-sugar-maple-leaf-litterhttps://www.uvm.edu/femc/CI4/data/archive/project/foliar-nitrogen-variability-resorption-during-autumn/dataset/nitrogen-content-sugar-maple-leaf-litterIDID NumberID number of sampleintTreeNumberTree #Number of tree sampledintdatesSample DateDate sample was collecteddatetimeYYYY-MM-DDweeknumberWeek NumberNumber of the week in relation to the start of the research the sample was collectedintAreaCM2AreaArea of leaf surface areadecimalsquareCentimeters0.01realdrywt_gDry WeightWeight of leaves or leaf litter oven dried at 70 degrees celsiusdecimalgram0.01realCHN_analysisWT_ugCHN WeightWeight determined by CHN elemental analyzer (weight of leaf or leaf litter sample)decimalmicrogram10realPercentage_NPercent NitrogenPercent of nitrogen in leaf litterdecimalpercent0.01real0100QC_adjustQC AdjustQuality control adjustmentdecimalnumber0.0001realug_N_cm2ug N/cm2Micrograms of nitrogen per centimeter squared: the amount of nitrogen found in a given areadecimalcustomMicrogramsPerSquareCentimeter0.00000001realNitrogenforTreeNumbNitrogen for Tree #Number of tree used for sample collectiondecimalnumber1integer27SeptSeptember_27Amount of Nitrogen in trees on September 27decimalcustomMicrogramsPerSquareCentimeter0.00000001real30SeptSeptember_30Amount of Nitrogen in trees on September 30decimalcustomMicrogramsPerSquareCentimeter0.00000001real5OctobOctober_5Amount of Nitrogen in trees on October 5decimalcustomMicrogramsPerSquareCentimeter0.00000001real8OctobOctober_8Amount of Nitrogen in trees on October 8decimalcustomMicrogramsPerSquareCentimeter0.00000001real11OctobOctober_11Amount of Nitrogen in trees on October 11decimalcustomMicrogramsPerSquareCentimeter0.00000001real13OctobOctober_13Amount of Nitrogen in trees on October 13decimalcustomMicrogramsPerSquareCentimeter0.00000001real18OctobOctober_18Amount of Nitrogen in trees on October 18decimalcustomMicrogramsPerSquareCentimeter0.00000001realMean_NMean NitrogenMean amount of Nitrogen in tree (average of each day sampled for each tree)decimalcustomMicrogramsPerSquareCentimeter0.00000001real