GLBRC088:GLBRC Soil Properties — Biofuel Cropping System Experiment

• Status: active
• Temporal Coverage 2008-01-01 to 2024-12-31

Tables

GLBRC088-001 Soil pH

Soil pH of surface soils (0-25 cm) from BCSE treatments (G1-G10) collected occasionally in the fall to monitor pH levels.

GLBRC088-002 Soil Moisture (Gravimetric)

Gravimetric soil moisture of surface cores (0-25 cm) from all BCSE treatments (G1-G10). These data are used to adjust soil inorganic nitrogen measurements for moisture content.

GLBRC088-003 Soil Bulk Density

Soil bulk density of surface (0-25 cm) and deep (to ~1 m) core samples from all BCSE treatments (G1-G10). Surface cores were taken in 2008-2009; deep cores are taken every 5-10 years, beginning in 2008, to primarily monitor for changes in carbon and nitrogen stocks.

GLBRC088-005 Arlington Baseline Surface Soil Survey

Soil samples collected 30 June-2 July 2008 and analyzed for an array of compounds to serve as a baseline soil survey for the Arlington GLBRC Biofuel Cropping System Experiment (G1-G10, plus auxiliary G11-G12). One bulk density core was taken per plot and that value is applied to all subsamples in the plot.
All samples are from horizon “act”. The 0-10 cm samples were collected with 6 cm height cores and the 10-25 cm samples were collected with 15 cm height cores; the core diameter for all was 3.7 cm

GLBRC088-008 Agronomic Soil Chemistry

Surface soil samples (0-25 cm) are collected annually (usually in the Fall) from the main plot and alternative treatment subplots (most years) of all BCSE treatments (G1-G10), then dried and sent to an analytical laboratory for fertilizer recommendations and analysis of pH, lime index, phosphorus, potassium, calcium, magnesium, and cation exchange capacity. Beginning in 2018, samples from annual treatments are analyzed every year and those from perennial crops are analyzed every three years.

GLBRC088-012 Soil Inorganic Nitrogen

Soil extractable inorganic nitrogen (ammonium and nitrate plus nitrite) concentrations, corrected for soil moisture, in surface soils (0 – 25 cm) of all BCSE treatments (G1-G10). Sampling frequency has changed over the years and includes 1) annual fall measurements from main plots plus treatment subplots since 2016; 2) three measurements spaced over the growing seasons in 2014-2015; and 3) biweekly measurements from 2010-2012.

GLBRC088-013 Soil Inorganic Nitrogen (Resin Strip Method)

Relative amount of nitrate and ammonium available in soils of all BCSE treatments (G1-G10) over the 2009 growing season as determined by the resin strip method. See datatable GLBRC088-012 for additional inorganic N data.

GLBRC088-018 Soil Temperature

Soil temperature at soil sampling of the Arlington GLBRC Biofuel Cropping System Experiment. KBS does not measure temperature when soil sampling.

GLBRC088-019 Nitrogen Mineralization

Potential nitrogen mineralization and nitrification rates measured 3 times over the 2013 growing season (early season, mid-season, and post-harvest) in main plots and alternative treatment subplots of BCSE treatments (G1-G10) by 28-day lab incubations. Rates are determined as the change in soil nitrate (plus nitrite) and ammonium over the incubation period.

GLBRC088-021 KBS Baseline Soil Carbon and Nitrogen

One hundred surface (0-10 cm) soil samples were collected in early spring 2008 at the KBS GLBRC Intensive site to map soil carbon and nitrogen before establishment of the Biofuel Cropping System Experiment and Switchgrass Nitrogen/Harvest Experiment. Samples were taken on a regular grid (20 × 100 meters) and sample coordinate locations were recorded with GPS.

GLBRC088_023 Soil Texture and Soil Organic Matter at ERT Plots

Soil texture and soil organic matter data collected at ERT (electrical resistivity tomography) plots.

GLBRC088-024 Gravimetric soil moisture for BCSE rainout shelter experiment

Gravimetric soil moisture of rainout shelter experiment at the GLBRC BCSE.

GLBRC088-028 Soil Water Chemistry

Soil water (leachate) samples collected from low-tension soil water samplers (also called suction lysimeters) buried ~1.2 meters deep in the main plot of all BCSE treatments (R1-R4 only) and analyzed for a range of chemical and physical properties.

GLBRC088-029 Volumetric Soil Moisture (Hyrdosense)

Surface(0 to 12 cm) soil moisture measurements were taken with a Hydrosense II probe These soil moisture samples are usually taken in conjuction with the static gas chamber samples. Soil moisture measurements below 6% were set to 6%, the detection limit of the Hyrdosense Probe.

Protocols