Deep core soil fractions and organic matter

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Organic matter and size fractions from 65 deep core soil samples collected from 10 of the KBS LTER scaleup fields. Within each field we identified three topographicalpositions (DE-depression/footslope, SL-backslope, and SU-summit) and had 1-2 sampling sites at each position.

Samples were collected between April 27 and May 4 2010.

This datatable is part of the Deep core soil samples from KBS LTER Scaleup fields dataset. This dataset contains soil deep core data from Kravchenko, A. N., S. S. Snapp, and G. P. Robertson. 2017. Field-scale experiments reveal persistent yield gaps in low-input and organic cropping systems. Proceedings of the National Academy of Sciences USA 114:926-931. Additional data at


Experiment: MCSE Scale-up Experiment
Data available from: April 2010 to May 2010
Dataset: KBS124
Datatable ID: KBS124-001.20
Core Areas Organic Matter,Inorganic Nutrients
Repository link:
Last Updated 2018-02-13
Variate Description Units
field KBS field ID
topographic position Topographic position of the sample (DE-depression/footslope, SL-backslope, and SU-summit)
site within field and topographic sample position.
depth depth range of the sample in cm
bulk density g cm3 bulk density of the sample section grams/cubiccentimeter
sand fraction sand fraction of the soil section g/g
clay fraction clay fraction of the soil section g/g
som percent Soil organic matter percentage %

Data Excerpt

field topographical_position site depth bulk_density_g_cm3 sand_fraction clay_fraction soc_percent
52 DE 1 0-20 1.592084624 0.560371087 0.12321242 0.8812
52 DE 1 20-35 1.857852419 0.572715214 0.117082735
52 DE 1 35-50 1.790964258 0.749769426 0.070962088 0.3247
52 DE 1 50-70 1.848964137 0.904163442 0.052057486 0.0909
52 DE 1 70-90+ 1.903305339 0.91983289 0.054416327 0.1192
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