GLBRC Sustainability Data Catalog

Switchgrass Stand Counts — Switchgrass Nitrogen Rate Experiment

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Stand counts of switchgrass populations in the GLBRC Switchgrass Nitrogen Rate Experiment (formerly Nitrogen/Harvest) periodically conducted in the spring to assess growth and recruitment. Counts are reported in number of plants per square meter.

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; since 2013 all split plots are harvested only once in the fall with yields measured separately.

See the Switchgrass Nitrogen Rate Experiment map for further details.

Note

Experiment: Switchgrass Nitrogen Rate Experiment
Data available from: January 2019 to December 2020
Dataset: GLBRC132
Datatable ID: GLBRC132_002.52
Repository link:
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Last Updated 2022-09-29
Variate Description Units
year year sampled
sample date date sampled
site experiment site
experiment experiment name
plot plot sampled
treatment treatment name
n kg ha annual N fertilization rate kg/ha
average stand count m2 number of plants per meter squared as estimated with the Vogel and Masters 2001 grid method number/metersquared

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Data Excerpt

year sample_date site experiment plot treatment n_kg_ha average_stand_count_m2
2020 2020-05-21 KBS GLBRC Intensive Site Switchgrass Nitrogen Experiment 101 SWF5 112 11.5
2020 2020-05-21 KBS GLBRC Intensive Site Switchgrass Nitrogen Experiment 102 SWF3 56 10.6
2020 2020-05-21 KBS GLBRC Intensive Site Switchgrass Nitrogen Experiment 103 SWF8 196 8.2
2020 2020-05-21 KBS GLBRC Intensive Site Switchgrass Nitrogen Experiment 104 SWF2 28 12.3
2020 2020-05-21 KBS GLBRC Intensive Site Switchgrass Nitrogen Experiment 105 SWF4 84 9.6
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