GLBRC Sustainability Data Catalog

Root Biomass in Deep Cores — GLBRC Switchgrass Nitrogen Rate Experiment

Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use

Root biomass in deep cores (0-1 m) collected from the Switchgrass Nitrogen Rate Experiment in 2013 for Leilei Ruan. Cores were taken from each treatment plot and sectioned into 0-10, 10-25, 25-50, and 50-100 depth intervals.

This datatable is part of the Switchgrass Nitrogen Rate Experiment dataset.

This dataset contains data from the Switchgrass Nitrogen Rate Experiment (formerly Nitrogen/Harvest) at the KBS GLBRC Intensive Field Site. Switchgrass is grown under 8 rates of nitrogen fertilization (F1-F8; 0-196 kg N/ha) with each treatment plot replicated in four blocks (R1-R4). From 2010–2012, the experiment also included split plots with two harvest strategies (H1, H2; 1 vs 2 harvests/yr) for each nitrogen treatment; from 2013 onward all split plots are harvested only once in the fall, with yields measured separately 2013-2022 and combined starting in 2023.

Note

Experiment: GLBRC Switchgrass Nitrogen Rate Experiment
Data available from: May 2013
Dataset: GLBRC132
Datatable ID: GLBRC130-005.126
Core Areas Primary Production
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Last Updated 2023-10-24
Variate Description Units
sample date the sample date
site
experiment the experiment
treatment treatment of switchgrass nitrogen application
plot switchgrass experimental plot
species crop species
harvest scheme switchgrass harvest scheme (H1: one harvest per growing season; H2: two harvests per growing season)
depth top cm top sampling depth cm
bottom depth cm bottom sampling depth cm
root weight root weight in the sample
core area area of sampling core
campaign sampling campaign
actual top depth cm cm
actual bottom depth cm cm

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Data Excerpt

sample_date site experiment treatment plot_id species harvest_scheme top_depth_cm bottom_depth_cm raw_weight_g core_area campaign actual_top_depth_cm actual_bottom_depth_cm
2013-05-14 KBS GLBRC Intensive Site Switchgrass Nitrogen Rate Experiment SWF6 403 Panicum virgatum L. H1 10.0 25.0 1.8 45.36 deep core sampling 10 25
2013-05-14 KBS GLBRC Intensive Site Switchgrass Nitrogen Rate Experiment SWF3 406 Panicum virgatum L. H1 25.0 50.0 1.16 45.36 deep core sampling 25 50
2013-05-14 KBS GLBRC Intensive Site Switchgrass Nitrogen Rate Experiment SWF3 406 Panicum virgatum L. H1 50.0 100.0 3.08 45.36 deep core sampling 50 95
2013-05-14 KBS GLBRC Intensive Site Switchgrass Nitrogen Rate Experiment SWF2 407 Panicum virgatum L. H1 0.0 10.0 1.52 45.36 deep core sampling 0 10
2013-05-14 KBS GLBRC Intensive Site Switchgrass Nitrogen Rate Experiment SWF2 407 Panicum virgatum L. H1 10.0 25.0 1.67 45.36 deep core sampling 10 25
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