Cover Crop Biomass

Productivity data for cover crops in LTER main site treatments. In wheat years the cover crop is planted in the spring and then tilled in the next spring, and the cover crop is measured before tillage. So the wheat years tend not to have a cover crop harvest.

This datatable is part of the Annual Net Primary Production on the Main Cropping System Experiment dataset. Aboveground annual net primary production (ANPP) has been measured on the LTER main site since 1990 and on the successional and forested sites since 1993. ANPP is measured at peak biomass for a given treatment. In some systems with multiple harvests or complex communities that have peaks occurring at different times of the year, measurements are taken at multiple times per year. Additional ANPP measurements are made where appropriate using leaf litter traps, estimates of diameter from tree basal diameter and for the poplar treatment occasional destructive harvests. See the ANPP protocol for descriptions of the sampling and measurement methods for each of the treatments.

Note

Experiment: Main Cropping System Experiment (MCSE)
Data available from: January 1990 to October 2015
Dataset: KBS019
Datatable ID: KBS019-005.74
Core Areas Primary Production,Disturbance
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Personnel:
Last Updated 2017-12-19
Variate Description Units
year year of the growing season relevant for the sample
campaign a major multi-year research activity with a discreet purpose
date date on which sampling occured
treatment main experimental treatment
replicate replicate block, nested within treatment
station replicate station, nested within block
species species collected
biomass g dry mass of sampled material in grams/meter squared g/m2

Data Excerpt

year campaign date treatment replicate station species biomass_g
2015 Cover Harvest 2015-05-22 T4 R6 S5 Potentilla sp. 209.559
2015 Cover Harvest 2015-05-22 T4 R6 S4 Secale cereale M.Bieb. 146.094
2015 Cover Harvest 2015-05-22 T4 R6 S3 Veronica arvensis L. 97.528
2015 Cover Harvest 2015-05-22 T4 R6 S2 Anthemis sp. 128.825
2015 Cover Harvest 2015-05-21 T4 R6 S1 Secale cereale M.Bieb. 109.44
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