GLBRC Sustainability Data Catalog

Dry Matter Yield — Switchgrass Nitrogen Rate Experiment

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Dry matter yields of the Switchgrass Nitrogen Rate Experiment (formerly Nitrogen/Harvest). Yields are from machine harvests at ~6 inch cutting height and are recorded as Mg dry matter per hectare.

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: January 2009 to January 2021
Dataset: GLBRC132
Datatable ID: GLBRC081-003.60
Repository link:
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Last Updated 2022-10-04
Variate Description Units
year year of the growing season
harvest date date the crop was harvested
treatment n rate amount of nitrogen added to the experimental treatment lb/ac
replicate replicate nested within treatment
yield tons acre dry matter yield tons/acre
yield mg ha dry matter yield Mg/ha
moisture percent crop percent moisture at harvest %
harvest strategy # of harvests per year
plot plot identifier
comments sample notes

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Data Excerpt

year harvest_date treatment_n_rate replicate yield_tons_acre yield_mg_ha moisture_percent harvest_strategy plot comments
2021 2021-11-05 0 1 1.91 4.28 35.1 1 harvest per year 108
2021 2021-11-05 0 1 1.37 3.08 32.4 1 harvest per year 108 This plot was harvested 2x/year through 2012
2021 2021-11-05 0 2 1.25 2.79 30.9 1 harvest per year 201 This plot was harvested 2x/year through 2012
2021 2021-11-05 0 2 1.71 3.84 37.3 1 harvest per year 201
2021 2021-11-05 0 3 1.03 2.31 32.9 1 harvest per year 307
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