Agronomic Yields — 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Agronomic grain yields of corn, soybean, and wheat harvested from rainfed and irrigated plots using a plot combine and expressed at standard moisture.
This datatable is part of the Resource Gradient Experiment dataset. This dataset contains the agronomic yields and soil properties of the LTER Resource Gradient Experiment, which applies nine different rates of nitrogen fertilization (F1-F9) to annual row crops under rainfed (since 1999) and irrigated (since 2003) conditions. Since 2006, row crops have followed the same rotation as the LTER Main Cropping System Experiment (MCSE; corn-soybean-wheat); continuous corn was grown from 1999-2005. Nitrogen fertilization rates differ by crop (since 2008) and are given on the plot map.
The experiment moved to its current location in the LTER Main Site in 2005; previous experimental designs and locations are given here
Note
| Experiment: | Resource Gradient Experiment |
| Data available from: | October 1999 to July 2019 |
| Dataset: | KBS033 |
| Datatable ID: | KBS033-001.113 |
| Core Areas | Primary Production,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/b87efd66b937c806061635e752862d8a |
| Related Tables: | |
| Personnel: |
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| Last Updated | 2024-03-18 |
| Variate | Description | Units |
|---|---|---|
| date | harvest date | |
| plot | plot number | |
| location | Study location. Please refer to the field location sketch. | |
| treatment | treatment number | |
| replicate | replicate that the sample was taken from | |
| irrigated | true if the plot is irrigated, false if it is not. | |
| fertilizer rate kg ha | the fertilizer rate applied | kg/ha |
| crop | crop grown | |
| yield kg ha | grain yield at standard moisture (15.5% for corn, 13% for soybean and wheat) | kg/ha |
| year | harvest year |
| Protocols |
|---|
| MCSE: Harvestable Biomass |
| Agronomic Yields |
Data Excerpt
| date | plot | location | treatment | replicate | irrigated | fertilizer_rate_kg_ha | crop | yield_kg_ha | year |
|---|---|---|---|---|---|---|---|---|---|
| 1999-10-13 | 901 | A | 8 | 1 | false | 246.0 | Zea mays L. (*) | 3482.0 | 1999 |
| 1999-10-13 | 902 | A | 3 | 1 | false | 67.0 | Zea mays L. (*) | 3835.0 | 1999 |
| 1999-10-13 | 903 | A | 7 | 1 | false | 202.0 | Zea mays L. (*) | 3018.0 | 1999 |
| 1999-10-13 | 904 | A | 4 | 1 | false | 101.0 | Zea mays L. (*) | 3632.0 | 1999 |
| 1999-10-13 | 905 | A | 9 | 1 | false | 291.0 | Zea mays L. (*) | 4430.0 | 1999 |