Switchgrass Stand Counts — Switchgrass NItrogen Fixation Experiement

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Stand counts of switchgrass populations of the Switchgrass Nitrogen Fixation Experiment periodically conducted in the spring to assess growth and recruitment.

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.

Note

Experiment: Switchgrass NItrogen Fixation Experiement
Data available from: April 2020 to October 2021
Dataset: KBS152
Datatable ID: KBS128-004.9
Core Areas Populations
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Last Updated 2024-05-06
Variate Description Units
year sample year
sample date
site
experiment
plot
station the station with the plot that was sampled, This indicates the location within the plot
average stand count m2 stand count estimated by the Vogel and Masters 2001grid method
legacy tillage treatment
fertilization F: fertilized; N: not-fertilized

Data Excerpt

year sample_date site experiment plot station stand_count_m2 legacy_tillage_treatment fertilization
2022 2022-05-24 KBS LTER Switchgrass Nitrogen Fixation Experiment 1 center 39.6 CT F
2022 2022-05-24 KBS LTER Switchgrass Nitrogen Fixation Experiment 1 north-east 40.0 CT F
2022 2022-05-24 KBS LTER Switchgrass Nitrogen Fixation Experiment 1 south-west 39.6 CT F
2022 2022-05-31 KBS LTER Switchgrass Nitrogen Fixation Experiment 10 center 40.0 NT F
2022 2022-05-31 KBS LTER Switchgrass Nitrogen Fixation Experiment 10 north-east 40.0 NT F
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