GLBRC Sustainability Data Catalog

Soil Inorganic Nitrogen — Switchgrass Nitrogen Rate 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use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 extractable nitrogen (ammonium and nitrate plus nitrate) concentrations in surface soils (0-25 cm) of the Switchgrass Nitrogen Rate Experiment, monitored over the 2009-2010 growing seasons, and reported as mg N per kg dry soil.

This datatable is part of the Switchgrass Nitrogen Rate Experiment dataset.

This dataset contains data from the Switchgrass Nitrogen Rate Experiment (formerly Nitrogen/Harvest) at the KBS GLBRC Intensive Field Site. Switchgrass is grown under 8 rates of nitrogen fertilization (F1-F8; 0-196 kg N/ha) with each treatment plot replicated in four blocks (R1-R4). From 2010–2012, the experiment also included split plots with two harvest strategies (H1, H2; 1 vs 2 harvests/yr) for each nitrogen treatment; from 2013 onward all split plots are harvested only once in the fall, with yields measured separately 2013-2022 and combined starting in 2023.

Note

Experiment: Switchgrass Nitrogen Rate Experiment
Data available from: January 2009 to January 2010
Dataset: GLBRC132
Datatable ID: GLBRC088-011.126
Repository link:
Related Tables:
Personnel:
Last Updated 2023-10-24
Variate Description Units
year year of the growing season
sample date date soil was collected
treatment name treatment name
treatment n rate kg ha experimental treatment - nitrogen application rate kg/ha
replicate replicate block nested within treatment
nitrate mg kg soil extractable nitrate plus nitrite, as N, average of analytical replicates, screened for outliers and corrected for soil moisture mg/kg
ammonium mg kg soil extractable ammonium, as N, average of analytical replicates, screened for outliers and corrected for soil moisture mg/kg
harvest strategy number of harvests per year
comments notes specific to the data row

GLBRC data is not yet publicly available.

Sign in to request the data

Data Excerpt

year sample_date block_trt treatment_name treatment_n_rate_kg_ha replicate nitrate_mg_kg ammonium_mg_kg harvest_strategy comments
2010 2010-11-11 B1F0 SWF1 0 1 1.22 4.94 1 harvest per year
2010 2010-11-11 B2F0 SWF1 0 2 1.12 7.31 1 harvest per year
Back to Data Catalog   EML formatted metadata