Seed Bank via Direct Germination — 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Seed bank data estimated by direct germination. Seeds are allowed to germinate and the number of plants are counted and identified.
This datatable is part of the Distribution and Composition of the Seed Bank dataset. The distribution and composition of the weed seed bank in treatments 1-7 of the LTER main site is periodically (every 3-6 years) evaluated using elutriation and seed counting methods. The goal is to determine:
- how well the seed bank predicts weed abundances and composition in subsequent years, and
- how changes in disturbance (tillage) and plant species (cropping systems) affect the bank. Composite soil samples to two depths are periodically elutriated to determine seed densities, species composition, and viabilities of seven target species which are dominant on the site.
Note
| Experiment: | Main Cropping System Experiment (MCSE) |
| Data available from: | May 1993 to May 2002 |
| Dataset: | KBS006 |
| Datatable ID: | KBS006-001.27 |
| Core Areas | Populations,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/c376065b1f83da0c335ca1091edf0491 |
| Related Tables: | |
| Personnel: |
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| Last Updated | 2020-07-10 |
| Variate | Description | Units |
|---|---|---|
| sample date | date the sample was taken from the field | |
| treatment | treatment that the sample was drawn from | |
| replicate | replicate (block) that the sample was drawn from | |
| station | station the sample was drawn from | |
| depth | depth that was sampled in cm | |
| cores | number of soil cores taken | number |
| sample divided | Indicates if the sample was split prior to processing | |
| surface area examined sq cm | surface area that was examined in cm^2 | squarecentimeters |
| ridge or furrow | indicates if the sample came from a ridge or furrow location as indicated by 'R' and 'F' or from a mixed sample as indicated by a blank. | |
| species | species that was found | |
| number of seeds | number of seeds that were found by direct germination | number |
| volume examined cu cm | soil volume that was examined | cm^3 |
Data Excerpt
| sample_date | treatment | replicate | station | depth | cores | sample_divided | surface_area_examined_sq_cm | ridge_or_furrow | species | number_of_seeds | volume_examined_cu_cm |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2002-05-20 | T1 | R1 | S1 | 0-5 cm | 20 | true | 28.35 | Digitaria sanguinalis (L.) Scop. | 1 | 141.75 | |
| 2002-05-20 | T1 | R1 | S2 | 0-5 cm | 20 | true | 28.35 | Poa compressa L. | 9 | 141.75 | |
| 2002-05-20 | T1 | R1 | S2 | 0-5 cm | 20 | true | 28.35 | Digitaria sanguinalis (L.) Scop. | 1 | 141.75 | |
| 2002-05-20 | T1 | R1 | S2 | 0-5 cm | 20 | true | 28.35 | Stellaria media (L.) Vill. | 1 | 141.75 | |
| 2002-05-20 | T1 | R1 | S3 | 0-5 cm | 20 | true | 28.35 | Digitaria sanguinalis (L.) Scop. | 1 | 141.75 |