Switchgrass Yields — Switchgrass Nitrogen Fixation Experiment

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.