public read Forest Ecosystem Monitoring Cooperative

705 Spear StreetSouth BurlingtonVermont05403United States of America

(802) 656-0683femc@uvm.eduwww.uvm.edu/femcMeasurement of leaf litter weight and amount of nitrogen in 20 sample trees on certain daysForest Ecosystem Monitoring CooperativeTimScherbatskoycontentProviderEvelineLeonprincipalInvestigatorMeasure 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.Nitrogen Content of Sugar Maple Leaf LitterMeasurement of leaf litter weight and amount of nitrogen in 20 sample trees on certain daysVMC.15.16mySQL/femc/data/archive/project/foliar-nitrogen-variability-resorption-during-autumn/dataset/nitrogen-content-sugar-maple-leaf-litter1993-09-271993-10-18IDID 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 areadecimalmeterrealdrywt_gDry WeightWeight of leaves or leaf litter oven dried at 70 degrees celsiusdecimalmeterrealCHN_analysisWT_ugCHN WeightWeight determined by CHN elemental analyzer (weight of leaf or leaf litter sample)decimalmeterrealPercentage_NPercent NitrogenPercent of nitrogen in leaf litterdecimalmeterreal0100QC_adjustQC AdjustQuality control adjustmentdecimalmeterrealug_N_cm2ug N/cm2Micrograms of nitrogen per centimeter squared: the amount of nitrogen found in a given areadecimalmeterrealNitrogenforTreeNumbNitrogen for Tree #Number of tree used for sample collectiondecimalmeterinteger27SeptSeptember_27Amount of Nitrogen in trees on September 27decimalmeterreal30SeptSeptember_30Amount of Nitrogen in trees on September 30decimalmeterreal5OctobOctober_5Amount of Nitrogen in trees on October 5decimalmeterreal8OctobOctober_8Amount of Nitrogen in trees on October 8decimalmeterreal11OctobOctober_11Amount of Nitrogen in trees on October 11decimalmeterreal13OctobOctober_13Amount of Nitrogen in trees on October 13decimalmeterreal18OctobOctober_18Amount of Nitrogen in trees on October 18decimalmeterrealMean_NMean NitrogenMean amount of Nitrogen in tree (average of each day sampled for each tree)decimalmeterreal