Agronomic Soil Chemistry — Switchgrass Nitrogen Rate 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Agronomic soil test results of the Switchgrass Nitrogen Rate Experiment. Surface soils (0-25 cm) are periodically sampled, air dried, and sent to an analytical laboratory (MSU Soil and Plant Nutrient Lab through 2022) for testing and fertilizer and liming recommendations.
This datatable is part of the Switchgrass Nitrogen Rate Experiment dataset.
This dataset contains 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.
Note
| Experiment: | Switchgrass Nitrogen Rate Experiment |
| Data available from: | October 2017 to January 2023 |
| Dataset: | GLBRC132 |
| Datatable ID: | KBS078-021.126 |
| Core Areas | Disturbance |
| Repository link: | |
| Related Tables: |
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| Personnel: |
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| Last Updated | 2023-11-08 |
| Variate | Description | Units |
|---|---|---|
| sample date | the date the sample was taken | |
| site | study site | |
| experiment | experiment | |
| plot | plot | |
| harvest strategy | (former) harvest strategy | |
| treatment | nitrogen treatment level | |
| soil sampling depth | depth of soil sampling | |
| est cec | Cation exchange capacity in meq/100g soil | meq/100g |
| pH | pH value 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 in soil | mg/kg |
| nitrogen rate | nitrogen application rate | lb/ac |
| lab | the lab that performed the analysis |
GLBRC data is not yet publicly available.
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| sample_date | site | experiment | plot | harvest_strategy | treatment | depth | est_cec | ph | lime_index | p_ppm | k_ppm | ca_ppm | mg_ppm | n_lb_a | lab |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2019-12-09 | KBS GLBRC Intensive Site | Switchgrass nitrogen rate experiment | 103 | H1 | SWF8 | 0-25 | 4.05 | 5.6 | 69 | 38 | 63 | 352 | 112 | 175 | MSU Soil and Plant Nutrient Laboratory |
| 2019-12-09 | KBS GLBRC Intensive Site | Switchgrass nitrogen rate experiment | 104 | H1 | SWF2 | 0-25 | 3.27 | 5.9 | 70 | 33 | 84 | 495 | 70 | 25 | MSU Soil and Plant Nutrient Laboratory |
| 2019-12-09 | KBS GLBRC Intensive Site | Switchgrass nitrogen rate experiment | 105 | H1 | SWF4 | 0-25 | 3.14 | 5.8 | 70 | 31 | 74 | 464 | 76 | 75 | MSU Soil and Plant Nutrient Laboratory |
| 2019-12-09 | KBS GLBRC Intensive Site | Switchgrass nitrogen rate experiment | 106 | H1 | SWF7 | 0-25 | 4.63 | 5.9 | 69 | 43 | 91 | 428 | 127 | 150 | MSU Soil and Plant Nutrient Laboratory |
| 2019-12-09 | KBS GLBRC Intensive Site | Switchgrass nitrogen rate experiment | 107 | H1 | SWF6 | 0-25 | 5.78 | 5.7 | 68 | 38 | 66 | 498 | 87 | 125 | MSU Soil and Plant Nutrient Laboratory |