GLBRC Sustainability Data Catalog

Plant Total Carbon and Nitrogen — Switchgrass Nitrogen Rate Experiment

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Total carbon and nitrogen content in the switchgrass crop of the Switchgrass Nitrogen Rate Experiment (formerly Nitrogen/Harvest). A subsample of the machine harvested crop is dried, ground, and analyzed for carbon and nitrogen content, reported as a percentage; the remaining subsample is archived.

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

See the Switchgrass Nitrogen Rate Experiment map for further details.

Note

Experiment: Switchgrass Nitrogen Rate Experiment
Data available from: November 2010 to November 2015
Dataset: GLBRC132
Datatable ID: GLBRC091-002.60
Repository link:
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Personnel:
Last Updated 2023-01-23
Variate Description Units
sample date date sampled
plot plot identifier
replicate replicate block
number harvests year number of harvests per year
treatment n rate nitrogen fertilization rate of treatment: corresponds to treatment_name. lb/ac
percent carbon percent carbon of switchgrass %
percent nitrogen percent carbon of switchgrass %

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Data Excerpt

sample_date plot replicate number_harvests_year treatment_n_rate percent_carbon percent_nitrogen
2019-11-04 101 1 H1 100 46.7913 0.7536
2019-11-04 102 1 H1 50 46.641 0.6747
2019-11-04 103 1 H1 175 47.1552 0.7966
2019-11-04 104 1 H1 25 46.383 0.5666
2019-11-04 105 1 H1 75 46.5098 0.722
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