GLBRC Sustainability Data Catalog

Soil Total Carbon and Nitrogen — Switchgrass Nitrogen Rate Experiment

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Soil total carbon and nitrogen in surface (0-25 cm) and deep (0-1 m) core samples from the Switchgrass Nitrogen Rate Experiment. Deep core samples were collected in 2013 for Leilei Ruan, 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.


Experiment: Switchgrass Nitrogen Rate Experiment
Data available from: May 2013 to November 2015
Dataset: GLBRC132
Datatable ID: GLBRC132-003.101
Core Areas Organic Matter
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Last Updated 2023-07-20
Variate Description Units
sample date date when the sample was taken from the field
treatment the treatment name
replicate the replicate name
sub plot the sub plot sampled (H1 = one harvest, H2 = 2 harvests per year until 2012)
top depth cm the top depth of the soil core taken
bottom depth cm the bottom depth of the soil core taken
nitrogen percent the percent total N by weight
carbon percent the percent total C by weight
internal plot name the internal name of the sample.

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Data Excerpt

sample_date treatment replicate sub_plot top_depth_cm bottom_depth_cm nitrogen_percent carbon_percent internal_plot_name
2015-11-18 SWF1 R1 H1 0 25 0.09 0.93 SWF1108H1025
2015-11-18 SWF1 R1 H2 0 25 0.12 1.03 SWF1108H2025
2015-11-18 SWF1 R2 H1 0 25 0.15 1.05 SWF1201H1025
2015-11-18 SWF1 R2 H2 0 25 0.06 0.76 SWF1201H2025
2015-11-18 SWF1 R3 H1 0 25 0.07 0.83 SWF1307H1025
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