Marginal Land Rainfall Exclusion Experiment

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GLBRC134:Marginal Land Rainfall Exclusion Experiment

This dataset contains data from the GLBRC Marginal Land Rainfall Exclusion Experiment established in 2018 to examine the effects of drought on switchgrass production and composition. Rainfall exclusion (rainout) shelters are deployed over the growing season in fertilized split plots of the Switchgrass treatment (G5) at all sites of the Marginal Land Experiment (MLE) and in the Switchgrass treatment (G5) plots of the Biofuel Cropping System Experiment (BCSE) at the KBS GLBRC Intensive Site, which serves as a reference for cropped soils with higher fertility. Rainout shelters are deployed in four G5 replicate plots of the BCSE (R2-R5) and of the MLE (R1-R4) at all sites except Wisconsin Central–Hancock (R2-R4), which has only three replicates.

Tables

GLBRC094-012 Soil Moisture (Volumetric, Automated)

Volumetric soil water content under rainfall exclusion “rainout” shelters and in adjacent “ambient” and “reserved” subplots of the Marginal Land Rainfall Exclusion Experiment measured with Campbell CS655 soil moisture sensors (https://www.campbellsci.com/cs655) buried horizontally at 10 cm and 25 cm depths and recorded hourly on Campbell CR800 dataloggers.

GLBRC134-001 Switchgrass Dry Matter Yield

Dry matter yields of switchgrass from hand-harvested subplots of the Marginal Land Rainfall Exclusion Experiment; subplots include rainout, ambient, and reserved, if implemented to examine additional agronomic activities (e.g., irrigated). Yield data are given as megagram dry matter per hectare.

GLBRC134-002 Agronomic Soil Chemistry

Surface soils under the rainfall exclusion ("rainout’) shelters are occasionally sampled and sent to an analytical lab (e.g., Michigan State University Soil and Plant Nutrient Laboratory through 2022) for fertilizer recommendations and analysis of pH, lime index, phosphorus, potassium, calcium, magnesium, and cation exchange capacity. To compare results with soils under ambient rainfall, use data from the fertilized G5 MLE split plots and BCSE main plots.

GLBRC134-004 Soil Moisture (Gravimetric)

Gravimetric soil moisture content of surface soils (0-25 cm) under “rainout” shelters in the Switchgrass treatment (G5) of the Marginal Land Rainfall Exclusion Experiment. These measurements accompany soil inorganic N determinations. To compare results with soils under ambient rainfall, use similar data from the fertilized G5 MLE split plots and BCSE main plots.

GLBRC134-005 1-hour Weather Observations

One-hour observations from the weather stations at the Marginal Land Experiment (MLE) sites. Observations are given as averages and totals for the hour.

GLBRC134-006 5-minute Weather Observations

5-minute observations from the weather stations at the Marginal Land Experiment (MLE) sites. Observations are given as averages and totals for the 5-minute interval.

GLBRC134-007 GPS Coordinates of MLE plots

The plot ploygons created by measuring the plot corners with a GPS. Also available as a zipped shapefile for Lux Arbor – Michigan South, Lake City – Michigan Central, Escanaba – Michigan North Hancock – Wisconsin – Middle Rhinelander Wisconsin – North and as a consolidated shapefile% Geometries of microplots are included

GLBRC134-008 Shelter Deployment and Removal Dates

A record of the dates the rainout shelters are deployed and removed from Switchgrass (G5) treatment plots.

GLBRC134-009 Humidity and Temperature under Rainout Shelter and Ambient Conditions

Hobo humidity loggers deployed under rainout shelters and ambient conditions to examine the potential effects of the shelters on humidity and/or temperature.

Protocols

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