Soil Bulk Density — 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Only a few bulk density samples were taken to characterize the Resource Gradient. Soil cores taken using ‘root corer’ – dimensions: 14.0 cm height x 7.9 cm diameter
On 08/21/2007 soil samples weighed using metal tins – sample dried in oven at 60 Celsius for 24 hours
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: | August 2007 to November 2016 |
| Dataset: | KBS033 |
| Datatable ID: | KBS033-008.91 |
| Core Areas | Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/b87efd66b937c806061635e752862d8a |
| Related Tables: | |
| Personnel: |
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| Last Updated | 2021-06-07 |
| Variate | Description | Units |
|---|---|---|
| sample date | date the sample was taken | |
| treatment | the treatment sampled | |
| replicate | the replicate sampled | |
| plot | the plot sampled | |
| core | The core number | |
| top depth cm | top of the depth of the sample (cm) | |
| bottom depth cm | bottom depth of the sample (cm) | |
| gravel free bulk density | bulk density of the gravel free soil fraction (gravel >4 mm removed) | |
| total bulkt density g cm3 | total bulk density (including any gravel) | |
| moisture | soil moisture at sampling (dry weight basis) | g/g |
| gravel weight |
Data Excerpt
| sample_date | treatment | replicate | plot | core | top_depth_cm | bottom_depth_cm | gravel_free_bulk_density_g_cm3 | total_bulk_density_g_cm3 | moisture | gravel_weight |
|---|---|---|---|---|---|---|---|---|---|---|
| 2016-11-01 | F1 | R2 | 203 | 3 | 10.0 | 25.0 | 1.36 | 1.4 | 0.19 | 11.470002 |
| 2016-11-01 | F1 | R2 | 203 | 3 | 0.0 | 10.0 | 1.38 | 1.41 | 0.18 | 5.280001 |
| 2016-11-01 | F1 | R2 | 203 | 2 | 10.0 | 25.0 | 1.25 | 1.29 | 0.19 | 14.539976 |
| 2016-11-01 | F1 | R2 | 203 | 2 | 0.0 | 10.0 | 1.4 | 1.43 | 0.19 | 6.299992 |
| 2016-11-01 | F1 | R2 | 203 | 1 | 10.0 | 25.0 | 1.24 | 1.32 | 0.17 | 24.349976 |