Cover Crop and Non-crop Biomass — Biodiversity Gradient Experiment

Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use

This weed dataset is collected prior to harvest to understand the impact of weed competition on crop yields and includes data from 2001, 2006-2011. Data was collected in 2002-2004 for a dissertation, which is yet not included here. No data was collected in 2005. Weeds were harvested in Aug-Sept through 2007. From 2008 forward, weeds were collected one month later in October.
See Smith, R. G., K. L. Gross, and G. P. Robertson. 2008. Effects of crop diversity on agroecosystem function: Crop yield response. Ecosystems 11:355-366.

This datatable is part of the Plant biomass collection on the Biodiversity Experiment dataset. The biodiversity gradient experiment is an additional long-term study located within the LTER Main Site complex, in which a series of 21 different experimental treatments vary in plant species diversity. Treatments range from bare soil to single-crop rotations to multiple-crop rotations to annually fallowed fields with early successional plant communities. Plant species richness thus varies from 0 to >15 in any given 3-year rotation cycle. Treatment plots are 9.1×27.4 meters (30×90 feet) replicated in each of 4 randomized blocks. The study site was established in 2000.


Experiment: Biodiversity Gradient Experiment
Data available from: September 2001 to October 2011
Dataset: KBS086
Datatable ID: KBS032-004.7
Core Areas Primary Production,Populations,Disturbance
Repository link:
Last Updated 2020-07-10
Variate Description Units
sample date date the sample was taken
plot id plot number
system code representing the cropping system used on the plot
description description of rotation system used on the plot
sample station sample station within the plot
species species name of the plant
biomass g m2 weed biomass harvested g/m2

Data Excerpt

sample_date plot_id system description sample_station species biomass_g_m2
2001-09-11 101 F Soybean single cover N UnSorted 37.28
2001-09-11 101 F Soybean single cover S UnSorted 13.16
2001-09-11 102 A Fallow spring plowed N UnSorted 645.2
2001-09-11 102 A Fallow spring plowed S UnSorted 750.52
2001-09-11 103 G Soybean N UnSorted 1.92
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