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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Grain yields (at standard moistures, in kg/ha) for corn, soy and wheat from rainfed and irrigated plots of the Resource Gradient Experiment.
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: | October 1999 to July 2019 |
| Dataset: | KBS033 |
| Datatable ID: | KBS033-001.91 |
| Core Areas | Primary Production,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/b87efd66b937c806061635e752862d8a |
| Related Tables: | |
| Personnel: |
|
| Last Updated | 2021-04-06 |
| 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 |
| Resource Gradient Experiment: Fertilizer Treatment Descriptions |
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 |