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The Effect of Nitrogen Addition and Different pH Levels on Microorganism Populations - Experiment 024

Plant aboveground biomass data

Years Available: 1987 - 1989

Principle Investigators

Hankinson, Tom
Schmidt, Ed
Tilman, David

View All Experiment and Dataset Methods


1Field number/letterField number/letter
2Experiment numberExperiment number
3Plot numberPlot number
4pH treatmentOther nutrient additions trying to create different pH levels1=received 62.5 g/m2 S 250 g/m2 FeSO4; 2=received no nutrients to adjust the pH level; 3=received 62.5 g/m2 of Ca(OH)2 in 1984 and 125 g/m2 in 1985; 4=received 125 g/m2 of Ca(OH)2 in 1984 and 250 g/m2 in 1985
5Nitrogen TreatmentNitrogen treatment applied twice per year5=8.0 g/m2; 7=25.0 g/m2; 9=0.0 g/m2
6Ammonium Nitrate(34-0-0) addition(g/m2/yr)Total annual nitrogen fertilizer additiongramsPerMeterSquaredPerYear
7Sampling date (YYMMDD)Sampling date (YYMMDD)
8Species NameSpecies Name
9Maximum plant height (cm)Maximum plant height (cm)centimeter
10Median plant height (cm)Median plant height (cm)centimeter
11Species Biomass (g/m2)Species Biomass (g/m2)gramsPerSquareMeter
12Species proportion of total biomassSpecies proportion of total biomassdimensionless


Field number/letterExperiment numberPlot number pH treatmentNitrogen TreatmentAmmonium Nitrate(34-0-0) addition(g/m2/yr)Sampling date (YYMMDD)Species nameMaximum plant height (cm)Median plant height (cm)Species Biomass (g/m2)Species proportion of total biomass
B2413516870715Hedeoma hispida80.6030.0029
B2413516870715Potentilla recta3.50.0530.0003
B2413516870715Achillea millefolium(lanulosa)30.43.5530.0169
B2413516870715Poa pratensis254.740.0225
B2413516870715Andropogon scoparius38195.30.9279
B2413516870715Andropogon gerardi446.1870.0294
B2413516870715Miscellaneous litter789.5330
B2413516870715Equisetum arvense11.30.0370.0002
B2413516870715Mosses & lichens1.1030
B2422750870715Andropogon gerardi3237.070.1668
B2422750870715Andropogon scoparius37.5152.70.687
B2422750870715Achillea millefolium(lanulosa)23.932.510.1463

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The Effect of Nitrogen Addition and Different pH Levels on Microorganism Populations: Plant aboveground biomass data

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