University of Minnesota
University of Minnesota
College of Biological Sciences


Seed Addition in Lawrence Strips - Experiment 113

Plant species percent cover data

Years Available: 1994 - 1998

Principle Investigators

Tilman, David


Description of Research Goals and Accomplishments: This experiment will test the affect of various species of seed addition and differing amounts of them on a newly abandoned area of the Lawrence strips. This experiment was set up in the northern end of the Lawrence strips after it was newly disked (no standing vegetation). There are 60 plots, each 3m x 3m with a .5m walkway between them. There are fifteen treatments, with 4 replicates of each treatment. The treatments are as follows, with the species of seed(s) and the amount added per plot: l. Ambrosia artemisiifolia, 90g 2. Agropyron repens, 67g 3. Poa pratensis, 45g 4. Schizachyrium scoparium, 67g 5. Andropogon gerardi, 67g 6. Mix of forbs, 50g 7. Mix 2 (see below) 8. Ambrosia artemisiifolia, 9g 9. Agropyron repens, 6.7g lO. Poa pratensis, 4.5g ll. Schizachyrium scoparium, 6.7g 12. Andropogon gerardi, 6.7g 13. Mix of forbs, 5g 14. Mix 3 (see below) 15. control-no seeds added Mix of forbs contains seeds of Achillea millefolium, Agastache foeniculum, Amorpha canescens, Aster azureus, Coreopsis palmata, Heliopsis helianthoides, Lespedeza capitata, Liatris aspera, Monarda fistulosa, Petalostemum candidum, Petalostemum purpureum, Rosa arkansana, Rudbeckia hirta, Solidago nemoralis, Solidago ptarmicoides, Solidago rigida, Verbena stricta and Zizia aurea. Mix 2 contains 50g Mix of forbs + 67g Schizachyrium scoparium + 67g Andropogon gerardi + 45g Poa pratensis + 90g Agropyron repens per plot. Mix 3 contains 5g Mix of forbs * 6.7g Schizachyrium scoparium + 6.7g Andropogon gerardi + 5g Poa pratensis + 9g Agropyron repens per plot. The seeds were added to the plots on June 14, 1993.

View All Experiment and Dataset Methods

Environmental Data Initiative data package

EDI Package ID DOI


1Experiment number Experiment number
2Plot number Plot number
3Sampling dateSampling date (YYMMDD)
4Sampling year Sampling year (YYYY)
5Gopher mound Presence of gopher moundsY=present, N=not present
6Species nameSpecies name1=Present,0=Not present
7Absolute percent cover Absolute percent cover dimensionless
8Relative percent coverRelative percent coverdimensionless
9Crew initials Crew initials
10Quadrat Quadrat


Experiment number Plot number Sampling dateSampling year Gopher mound Species name Absolute percent cover Relative percent cover Crew initials Quadrat Note
11319407271994NAgropyron repens0.750.01463tcd drc
11319407271994NAmbrosia artemisiifolia elatior1.50.02927tcd drc
11319407271994NBare ground43.750tcd drc
11319407271994NBerteroa incana60.11707tcd drc
11319407271994NDigitaria ischaemum130.25366tcd drc
11319407271994NErigeron canadensis60.11707tcd drc
11319407271994NMiscellaneous litter50tcd drc
11319407271994NSchizachyrium scoparium220.42927tcd drc
11319407271994NVicia villosa20.03902tcd drc
11329407271994NAgropyron repens0.50.01575tcd drc
11329407271994NAmbrosia artemisiifolia elatior20.06299tcd drc
11329407271994NBare ground63.250tcd drc

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Seed Addition in Lawrence Strips : Plant species percent cover data

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