Switchgrass Yields — Switchgrass NItrogen Fixation Experiement

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Dry matter switchgrass yields from machine harvests of the Switchgrass Nitrogen Fixation Experiment (plots 1-16). Plots were converted from the corn-soybean-wheat rotation of the LTER Main Cropping System Experiment (MCSE) to switchgrass in 2016, with the first harvest in 2018. See the Interactions Experiment for agronomic grain yields before conversion.

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

This dataset contains data from the Switchgrass Nitrogen Fixation Experiment established in 2016 after conversion of the historically tilled plots (1-16) of the Interactions Experiment from annual crops to switchgrass (Cave-in-rock). The experiment maintained the fertilizer treatment (fertilized and not fertilized) of the Interactions Experiment, but the tillage treatment was discontinued because switchgrass is a perennial crop that is not tilled. From 2018-2022, a rainout shelter experiment that also used buried mesocosms was conducted in the legacy no-till, no fertilizer plots (3, 6, 8, and 9) to examine the effect of soil wetting/drying regimes on the relationship between associative nitrogen fixation (ANF) and switchgrass phenology, diazotroph communities, and nifH expression. The experiment was retired after the 2022 growing season in order to establish the Switchgrass Biodiversity Experiment.


Experiment: Switchgrass NItrogen Fixation Experiement
Data available from: December 2018 to November 2019
Dataset: KBS152
Datatable ID: KBS127-006.9
Core Areas Primary Production
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Last Updated 2024-04-30
Variate Description Units
sample date harvest date
plot plot name
legacy tillage treatment legacy tillage treatment in Interaction Experiment
fertilization F: fertilized; N: not-fertilized
species species planted and harvested
yield metric tons ha dry matter yield in metric tons/ha

Data Excerpt

sample_date plot legacy_tillage_treatment fertilization species yield_metric_tons_ha
2018-12-19 1 CT F Panicum virgatum L. 3.29065
2019-11-04 1 CT F Panicum virgatum L. 7.0575433
2018-12-19 2 CT N Panicum virgatum L. 3.1955738
2019-11-04 2 CT N Panicum virgatum L. 3.834302
2018-12-19 3 NT N Panicum virgatum L. 6.468461
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