Dry Matter Yield — Switchgrass Nitrogen Rate Experiment
Dry matter yields of the Switchgrass Nitrogen Rate Experiment (formerly Nitrogen/Harvest). Yields are from machine harvests at ~6 inch cutting height and are recorded as Mg dry matter per hectare.
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:||January 2009 to January 2021|
|year||year of the growing season|
|harvest date||date the crop was harvested|
|treatment n rate||amount of nitrogen added to the experimental treatment||lb/ac|
|replicate||replicate nested within treatment|
|yield tons acre||dry matter yield||tons/acre|
|yield mg ha||dry matter yield||Mg/ha|
|moisture percent||crop percent moisture at harvest||%|
|harvest strategy||# of harvests per year|
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|2021||2021-11-05||0||1||1.91||4.28||35.1||1 harvest per year||108|
|2021||2021-11-05||0||1||1.37||3.08||32.4||1 harvest per year||108||This plot was harvested 2x/year through 2012|
|2021||2021-11-05||0||2||1.25||2.79||30.9||1 harvest per year||201||This plot was harvested 2x/year through 2012|
|2021||2021-11-05||0||2||1.71||3.84||37.3||1 harvest per year||201|
|2021||2021-11-05||0||3||1.03||2.31||32.9||1 harvest per year||307|