Soil Water Chemistry — Switchgrass Nitrogen Rate Experiment
Soil water (leachate) samples collected biweekly throughout the growing season from low-tension soil water samplers (also called suction lysimeters) buried ~1.2 meters deep in replicates R2-R4 of the Switchgrass Nitrogen Rate Experiment (formerly Nitrogen/Harvest) and analyzed for a range of chemical parameters.
This datatable is part of the Switchgrass Nitrogen Rate Experiment dataset. 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.
See the Switchgrass Nitrogen Rate Experiment map for further details.
|Experiment:||Switchgrass Nitrogen Rate Experiment|
|Data available from:||June 2009 to December 2021|
|sample date||sampling date|
|replicate||block of the experiment|
|Cnd-L||Specific Conductance Lab||µS/cm|
|pH-lab||pH measured in lab|
|Ca-IC||Ca measured by ion chromotagraphy||mg/L|
|Mg-IC||Mg measured by ion chromotagraphy||mg/L|
|Na-IC||Na measured by ion chromotagraphy||mg/L|
|K-IC||K measured by ion chromotagraphy||mg/L|
|longitude||longitude of lysimeter location (SRID 4326)|
|latitude||latitude of lysimeter location (SRID 4326)|
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|sample_date||comments||site||replicate||plot||harvest_scheme||NO3-N||Cl||SO4||Cnd-L||TDP||pH - lab||Ca-IC||Mg-IC||Na-IC||K-IC||longitude||latitude|
|2009-06-19||soil water samplers||GLBRC Switchgrass Fertility/Harvest Trial||4||408||H2||4.944404||2.1404083||13.072335||210.0||8.378321||6.77||25.947613||5.290171||10.443807||1.7317835||-85.370860418||42.393741149|
|2009-06-19||soil water samplers||GLBRC Switchgrass Fertility/Harvest Trial||4||407||H2||10.4583845||1.9974751||19.296999||264.0||5.532853||6.78||34.297493||7.1583977||7.845037||1.0279877||-85.370909624||42.393740691|
|2009-06-19||soil water samplers||GLBRC Switchgrass Fertility/Harvest Trial||4.||406||H2||9.145508||1.9744978||11.89244||189.1||9.168728||6.64||24.510366||4.6999364||5.4099927||1.6050361||-85.370967405||42.393743335|
|2009-06-19||soil water samplers||GLBRC Switchgrass Fertility/Harvest Trial||4||405||H2||5.399599||6.193739||26.723125||398.0||26.241531||7.09||44.03379||13.892035||20.330872||3.6264212||-85.371026202||42.393742189|
|2009-06-19||soil water samplers||GLBRC Switchgrass Fertility/Harvest Trial||4||404||H2||12.54686||1.7598586||12.367838||266.0||15.491988||6.81||30.326416||8.2888155||9.884716||2.304965||-85.371079999||42.393741146|