Soil Test Lab Analyses - Agronomic — Resource Gradient 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Analytical results from the MSU Soil Test Lab on soil samples taken periodically from the Resource Gradient Experiment to determine fertilizer recommendations.
This datatable is part of the Resource Gradient Experiment dataset. This study provides a gradient of 9 different rates of nitrogen fertilization under rainfed and irrigated conditions. Irrigation began in 2003. Corn was grown from 2000-2005 and subsequently the crop rotation (wheat, corn, soybean) followed the crop of the LTER main site. Nitrogen applications differ by crop after 2007.
The experiment was moved to its current location on the LTER main site in 2005. The experiment location/history are explained here.
Plots are 5×30 m arranged in each of 4 replicate blocks .
Crop yields, nitrous oxide and soil temperature, moisture and nitrogen data are available for this study.
Note
| Experiment: | Resource Gradient Experiment |
| Data available from: | September 2011 to November 2019 |
| Dataset: | KBS033 |
| Datatable ID: | KBS033-005.91 |
| Core Areas | Inorganic Nutrients,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/b87efd66b937c806061635e752862d8a |
| Related Tables: | |
| Personnel: |
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| Last Updated | 2022-02-17 |
| Variate | Description | Units |
|---|---|---|
| site | experimental site that was sampled | |
| sample date | date the sample was taken | |
| plot | plot number | |
| treatment | treatment where the sample was taken from | |
| replicate | replicate plot the sample was taken from | |
| top depth cm | the top depth of the soil sample | centimeter |
| irrigated | true if the plot is irrigated, false if it is not | |
| bottom depth cm | the bottom of the soil core | centimeter |
| ph | pH measured | dimensionless |
| p | Bray P1 phosphorus in ppm | mg/kg |
| k | potassium in ppm | mg/kg |
| ca | calcium in ppm | mg/kg |
| mg | magnesium in ppm | mg/kg |
| lime index | the lime index | |
| cec | estimated cation exchange capacity meq/100g | |
| z ppm | zinc in ppm | mg/kg |
| s ppm | sulfur in ppm | mg/kg |
| b ppm | boron in ppm | mg/kg |
| Protocols |
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| KBS Agronomic Soil Chemistry |
Data Excerpt
| site | sample_date | plot | treatment | replicate | top_depth_cm | bottom_depth_cm | irrigated | ph | p | k | ca | mg | lime_index | cec | z_ppm | s_ppm | b_ppm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Resource Gradient Experiment | 2011-09-07 | 104 | F4 | R1 | 0 | 25 | false | 6.8 | 21.0 | 48.0 | 649.0 | 167.0 | |||||
| Resource Gradient Experiment | 2011-09-07 | 709 | F1 | R3 | 0 | 25 | true | 6.8 | 20.0 | 56.0 | 846.0 | 180.0 | |||||
| Resource Gradient Experiment | 2011-09-07 | 806 | F2 | R4 | 0 | 25 | true | 6.8 | 19.0 | 87.0 | 780.0 | 176.0 | |||||
| Resource Gradient Experiment | 2011-09-07 | 605 | F3 | R2 | 0 | 25 | true | 6.8 | 24.0 | 67.0 | 716.0 | 130.0 | |||||
| Resource Gradient Experiment | 2011-09-07 | 101 | F1 | R1 | 0 | 25 | false | 6.5 | 29.0 | 63.0 | 422.0 | 83.0 | 70.0 |