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Plant Canopy Species and Height — GLBRC Marginal Land Experiment

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Canopy species composition and height is surveyed at or near maturity of the dominant plant species using the line point intercept method

This datatable is part of the Cropping Systems – Marginal Land Experiment dataset. This dataset contains data on the biofuel cropping systems of the GLBRC Marginal Land Experiment (MLE) originally established in 2013 at north, central and south sites in Wisconsin and Michigan. The experiment consists of six different biofuel cropping systems (a.k.a. treatments; G5-G10; including switchgrass, miscanthus, native grasses, hybrid poplar, early successional, and restored prairie) plus an historical vegetation control (G11), replicated in each of 4 blocks (R1-R4) at each site. Split-plot treatments were initiated in 2014-2016 to examine the effect of nitrogen fertilization [plus_n (+N) vs control (0N)] on all cropping systems.

Seasonal deployment of rainfall exclusion (rainout) shelters in the fertilized split plot of the switchgrass (G5) treatment began in 2018 to examine the effects of drought on plant growth. See the Marginal Land Rainfall Exclusion Experiment for these data.

Note that Block 1 at the Wisconsin Central – Hancock site was retired in 2015 and the entire Wisconsin South – Oregon site was retired after 2018 growing season when the maintenance, harvest, sampling and analysis of the remaining Wisconsin sites was transferred from UW staff to MSU staff.

Note

Experiment: GLBRC Marginal Land Experiment
Data available from: August 2017 to September 2020
Dataset: GLBRC126
Datatable ID: GLBRC126-002.97
Core Areas Populations
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Last Updated 2023-01-13
Variate Description Units
sample date sample date
site experimental site
treatment treatment sampled
replicate replicate sampled
split plot plus_n or control (no N) subplot
line transect line sampled
species species of first plant intercepted or ground cover type if no plant intercepted
height height of the first plant intercepted centimeter
has lodged had the plant that was measured lodged? True (t) or false (f)
comments comments about the observation

Data Excerpt

sample_date site treatment replicate split_plot line species height_cm has_lodged comment
2019-09-04 Rhinelander G7 R1 control 2 Andropogon gerardii 222.0 false
2019-09-04 Rhinelander G7 R1 plus_n 3 Andropogon gerardii 211.0 false
2019-09-04 Rhinelander G7 R1 plus_n 4 Andropogon gerardii 223.0 false
2019-09-04 Rhinelander G7 R1 plus_n 4 Andropogon gerardii 197.0 false
2019-09-04 Rhinelander G7 R2 control 2 Andropogon gerardii 198.0 false
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