Agronomic Soil Chemistry — GLBRC Marginal Land Rainfall Exclusion Experiment
Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Surface soils under the rainfall exclusion ("rainout’) shelters are occasionally sampled and sent to an analytical lab (e.g., Michigan State University Soil and Plant Nutrient Laboratory through 2022) for fertilizer recommendations and analysis of pH, lime index, phosphorus, potassium, calcium, magnesium, and cation exchange capacity. To compare results with soils under ambient rainfall, use data from the fertilized G5 MLE split plots and BCSE main plots.
This datatable is part of the Marginal Land Rainfall Exclusion Experiment dataset. This dataset contains data from the GLBRC Marginal Land Rainfall Exclusion Experiment established in 2018 to examine the effects of drought on switchgrass production and composition. Rainfall exclusion (rainout) shelters are deployed over the growing season in fertilized split plots of the Switchgrass treatment (G5) at all sites of the Marginal Land Experiment (MLE) and in the Switchgrass treatment (G5) plots of the Biofuel Cropping System Experiment (BCSE) at the KBS GLBRC Intensive Site, which serves as a reference for cropped soils with higher fertility. Rainout shelters are deployed in four G5 replicate plots of the BCSE (R2-R5) and of the MLE (R1-R4) at all sites except Wisconsin Central–Hancock (R2-R4), which has only three replicates.
Note
| Experiment: | GLBRC Marginal Land Rainfall Exclusion Experiment |
| Data available from: | January 2012 to October 2021 |
| Dataset: | GLBRC134 |
| Datatable ID: | GLBRC134-002.99 |
| Core Areas | Inorganic Nutrients |
| Repository link: | |
| Related Tables: |
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| Last Updated | 2023-01-19 |
| Variate | Description | Units |
|---|---|---|
| year | year soil sample was collected | |
| sample date | date of soil coring | |
| site | Wisconsin or Michigan sampling site | |
| treatment | experimental treatment | |
| replicate | replicate nested within treatment | |
| campaign | sampling intent | |
| top depth cm | upper soil sampling depth | centimeter |
| bottom depth cm | lower soil sampling depth | |
| pH | pH of soil solution | |
| lime index | indicator of potential acidity | |
| p ppm | phosphorus in soil | mg/kg |
| k ppm | potassium in soil | mg/kg |
| ca ppm | calcium in soil | mg/kg |
| mg ppm | magnesium ppm in soil | |
| field section | section of the field sampled | |
| n treatment | nitrogen treatment of given split plot | |
| est cec | Cation exchange capacity in meq/100g soil | meq/100g |
| om percent | organic matter percent | % |
| wi plot id | Arlington Wisconsin site's plot identifier | |
| comments | notes |
GLBRC data is not yet publicly available.
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| year | sample_date | site | treatment | replicate | campaign | top_depth_cm | bottom_depth_cm | ph | lime_index | p_ppm | k_ppm | ca_ppm | mg_ppm | field_section | n_treatment | est_cec | om_percent | wi_plot_id | comments |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021.0 | 2021-11-01 | Wisconsin North - Rhinelander | G5 | R4 | surface sampling | 0 | 25 | 5.0 | 66.0 | 296.0 | 100.0 | 354.0 | 69.0 | rainout | plus_n | 7.40141 | |||
| 2018.0 | 2018-11-19 | Michigan Central - Lake City Exp. Station | G5 | R3 | surface sampling | 0 | 25 | 6.4 | 69.0 | 36.0 | 28.0 | 727.0 | 56.0 | rainout | plus_n | 5.3734617 | |||
| 2021.0 | 2021-10-05 | Wisconsin Central - Hancock | G5 | R4 | surface sampling | 0 | 25 | 6.8 | 122.0 | 41.0 | 678.0 | 116.0 | rainout | plus_n | 4.461795 | ||||
| 2021.0 | 2021-11-01 | Wisconsin North - Rhinelander | G5 | R2 | surface sampling | 0 | 25 | 4.9 | 66.0 | 381.0 | 58.0 | 303.0 | 23.0 | rainout | plus_n | 6.6553845 | |||
| 2018.0 | 2018-11-09 | Wisconsin North - Rhinelander | G5 | R2 | surface sampling | 0 | 25 | 5.1 | 64.0 | 282.0 | 54.0 | 243.0 | 7.0 | rainout | plus_n | 8.611794 |