Switchgrass Stand Counts — Switchgrass Nitrogen Rate Experiment
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Stand counts of switchgrass populations in the Switchgrass Nitrogen Rate Experiment 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; 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 2019 to December 2020 |
| Dataset: | GLBRC132 |
| Datatable ID: | GLBRC132_002.87 |
| Repository link: | |
| Related Tables: |
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| Personnel: |
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| Last Updated | 2023-04-24 |
| 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 |
| Protocols |
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| Stand Counts – Perennials |
GLBRC data is not yet publicly available.
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| 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 |