Soil Test Lab Analyses - Agronomic

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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 October 2017
Dataset: KBS033
Datatable ID: KBS033-005.73
Core Areas Inorganic Nutrients,Disturbance
Related Tables:
Personnel:
Last Updated 2019-02-20
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
irrigated true if the plot is irrigated, false if it is not
ph pH measured dimensionless
p phosphorus in ppm µg/kg
k potassium in ppm mg/kg
ca calcium in ppm µg/kg
mg magnesium in ppm mg/kg
lime index the lime index
cec estimated cation exchange capacity meq/100g

Data Excerpt

site sample_date plot treatment replicate irrigated ph p k ca mg lime_index cec
Resource Gradient Experiment 2011-09-07 104 F4 R1 false 6.8 21.0 48.0 649.0 167.0
Resource Gradient Experiment 2011-09-07 709 F1 R3 true 6.8 20.0 56.0 846.0 180.0
Resource Gradient Experiment 2011-09-07 806 F2 R4 true 6.8 19.0 87.0 780.0 176.0
Resource Gradient Experiment 2011-09-07 605 F3 R2 true 6.8 24.0 67.0 716.0 130.0
Resource Gradient Experiment 2011-09-07 101 F1 R1 false 6.5 29.0 63.0 422.0 83.0 70.0
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