GLBRC Sustainability Data Catalog

Agronomic Soil Chemistry — GLBRC Scale-up 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use

Soil samples are taken on a near annual basis (usually after harvest in the fall) for fertilizer recommendations and analysis of pH, lime index, phosphorus, potassium, calcium, magnesium, and cation exchange capacity by an analytical service lab (Michigan State University Soil and Plant Nutrient Laboratory through 2022). Ten surface cores (0-25 cm) are collected at each sampling station, composited by station, then sieved and air dried before sending out for analysis. Note that these samples may also be analyzed for soil moisture and inorganic N.

This datatable is part of the GLBRC Scale-up Soil Properties dataset. Soil properties of fields at Lux Arbor Reserve (L1-L3) and Marshall Farm (M1-M4) planted to corn (L1, M1), switchgrass (L2, M3), and restored prairie (L3, M2) in 2010 after a 2009 no-till soybean crop in all fields to convert tilled corn-soybean-wheat rotations (AGR) at Lux Arbor and fields in the Conservation Reserve Program (CRP) at Marshall Farm to no-till bioenergy crops. One field at Marshall Farm (M4) remained as CRP brome grass to serve as a reference. Each field has 10 sampling stations (S1-S10) around which most soil sampling occurs.

Note

Experiment: GLBRC Scale-up Experiment
Data available from: October 2008 to November 2020
Dataset: GLBRC124
Datatable ID: GLBRC088-009.59
Repository link:
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Last Updated 2022-10-11
Variate Description Units
sample date date of sample collection
site experimental location
treatment name treatment description
treatment experimental treatment
station sampling location
campaign type of soil sampling
pH soil pH
lime index indicator of potential acidity
p ppm phosphorus concentration mg/kg
k ppm potassium concentation mg/kg
ca ppm calcium concentration mg/kg
mg ppm magnesium concentraton mg/kg
zn ppm zinc concentration mg/kg
s ppm sulfur_concentration mg/kg
b ppm boron concentration mg/kg
top depth upper depth of soil sample centimeter
bottom depth lower depth of soil core centimeter
est cec estimated cation exchange capacity

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Data Excerpt

sample_date site treatment_name treatment station campaign ph lime_index p_ppm k_ppm ca_ppm mg_ppm zn_ppm s_ppm b_ppm top_depth bottom_depth est_cec
2021-11-18 KBS Marshall Farms CRP-Reference M4 S9 surface sample 6.0 70.0 88.0 209.0 937.0 96.0 0 25 6.0208974
2021-11-18 KBS Marshall Farms CRP-Reference M4 S8 surface sample 6.0 70.0 67.0 184.0 933.0 88.0 0 25 5.870128
2021-11-18 KBS Marshall Farms CRP-Reference M4 S7 surface sample 5.6 69.0 76.0 222.0 876.0 100.0 0 25 6.982564
2021-11-18 KBS Marshall Farms CRP-Reference M4 S6 surface sample 6.0 69.0 69.0 229.0 1156.0 97.0 0 25 8.375513
2021-11-18 KBS Marshall Farms CRP-Reference M4 S5 surface sample 6.0 70.0 100.0 197.0 878.0 78.0 0 25 5.5451283
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