Poplar Density Yields — Main Cropping System Experiment (MCSE)
Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Yields, number of stems, and moisture content of poplar trees of the Poplar Density Study at clear-cut harvest of density microplots and of main plots. Also included is the harvested biomass of non-poplar trees that were not planted but germinated and grew during the study.
This datatable is part of the Poplar (T5) Density Study dataset.
A microplot study was conducted in the Poplar (T5) treatment of the LTER Main Cropping System Experiment (MCSE; 1989-2008) to examine the effect of three planting densities on poplar yields over two harvest cycles: the first cycle (1989-1998) included split plots of +/- herbicide use within each microplot and the second (1998-2008) recorded the coppiced regrowth of harvested trees. Poplars were planted in 1989 at spacings of 1 × 0.5 m, 2 × 1 m, and 2 × 3 m, in 43 m wide (E-W) and 25 m long (N-S) microplots arranged in one and a half rows along the northern edge of each replicate plot (R1-R6). The main plot was planted at a spacing of 2 × 1 m.
Note
| Experiment: | Main Cropping System Experiment (MCSE) |
| Data available from: | January 2008 |
| Dataset: | KBS129 |
| Datatable ID: | KBS129-001.28 |
| Core Areas | Primary Production |
| Repository link: | |
| Related Files: | |
| Personnel: |
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| Last Updated | 2024-04-25 |
| Variate | Description | Units |
|---|---|---|
| harvest date | the date of the harvest | |
| replicate | the field replicate of treatment T5 | |
| section | the planting density section | |
| plot area | the size of the plot | |
| dry weight kg m2 | biomass dry weight | |
| sample type | poplar or non-poplar biomass | |
| stem count | the number of stems in the section | |
| moisture | gravimetric biomass moisture at harvest | % |
| comments | comments about the observation |
| Protocols |
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Data Excerpt
| harvest_date | replicate | section | plot_area | dry_weight_kg_m2 | sample_type | stem_count | moisture | comments |
|---|---|---|---|---|---|---|---|---|
| 2008-01-22 | 1 | 1x0.5 SE | 561.6 | 0.41 | non-poplar | 133.0 | 44.704056 | moisture was pooled across replicates and locations since it was not significantly different |
| 2008-01-22 | 1 | 1x0.5 SE | 561.6 | 4.28 | poplar | 133.0 | 51.23131 | moisture was pooled across replicates and locations since it was not significantly different |
| 2008-01-22 | 2 | 1x0.5 SE | 561.6 | 0.18 | non-poplar | 104.0 | 44.704056 | moisture was pooled across replicates and locations since it was not significantly different |
| 2008-01-22 | 2 | 1x0.5 SE | 561.6 | 4.38 | poplar | 104.0 | 51.23131 | moisture was pooled across replicates and locations since it was not significantly different |
| 2008-01-22 | 3 | 1x0.5 SE | 561.6 | 0.2 | non-poplar | 205.0 | 44.704056 | moisture was pooled across replicates and locations since it was not significantly different |