University of Minnesota
University of Minnesota
College of Biological Sciences


Experiment 055 - Plant Competition Under Different Nitrogen Levels:A Garden Experiment

This garden plot experiment is located next to the E026 gardens in Field E (Old Field 44). This garden contained monocultures of major grass species from across the grassland biome of North America, and also 3 legume species (E070). The design and purpose were similar to E026, except the plots were larger. The basic experimental design consisted of growing plants in monoculture and in various competitive combinations on each of 14 different soil mixtures. In 1988 a bulldozer was used to remove 30 inches of top soil at the site. To each plot a certain amount of black dirt, ranging from 0.3 inches to 10 inches, was added. Total carbon ranged from 0.1928% to 5.63134% and total nitrogen ranged from 0.0158% to 0.4591%. The exact amounts of black soil added to each plot are described in the field operations.

Equal amounts of MgSO4, CaCO3, P2O5 \

Methods for e055


Dataset IDTitleRange of Years (# years with data)
lpe055Percent light penetration1989-1999 (4 years)
ple055Plant aboveground biomass data1989-1999 (7 years)
pce055Plant species percent cover data2002-2002 (1 year)
reproe055Reproductive biomass1989-1993 (3 years)
roote055Root biomass data1992-2002 (4 years)
rbe055Root biomass data1992-2002 (4 years)
nohe055Soil nitrate and ammonium1989-2002 (7 years)
ne055Soil nitrogen1989-1997 (2 years)
wee055Weed biomass1992-1994 (2 years)