Agronomic Yields

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.


Experiment: Resource Gradient Experiment
Data available from: October 1999 to October 2017
Dataset: KBS033
Datatable ID: KBS033-001.53
Core Areas Primary Production,Disturbance
Related Tables:
Last Updated 2018-02-02
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

Data Excerpt

date plot location treatment replicate irrigated fertilizer_rate_kg_ha crop yield_kg_ha year
2017-10-27 809 D 9 4 t Zea mays L. (*) 16567 2017
2017-10-27 808 D 7 4 t Zea mays L. (*) 15423 2017
2017-10-27 807 D 3 4 t Zea mays L. (*) 12674 2017
2017-10-27 806 D 2 4 t Zea mays L. (*) 9141 2017
2017-10-27 805 D 8 4 t Zea mays L. (*) 16952 2017
Back to Data Catalog   EML formatted metadata