Citation:

PANGAEA.885439

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Abstract:

This data set contains measurements of soil organic content, i. e. percentage of organic matter. Data presented here is from the Main Experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the main experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and functional richness (1, 2, 3, 4 functional groups). Plots were maintained in general by bi-annual weeding and mowing. Since 2010, plot size was reduced to 5 x 6 m and plots were weeded three times per year.

Soil organic content was determined from undisturbed soil cores at 27 locations distributed throughout the experimental site in spring 2002 before plot establishment. Two of the locations are now reference plots and thus not included in this data set. Soil cores were taken to 100 cm depth and separated in depth increments with a resolution of ten cm from ground level to 40 cm depth and 20 cm from 40 cm to 100 cm depth. The bulk material was passed through a sieve with 2 mm mesh size and only fine soil was used for the investigation of soil organic content. Percentage of organic matter for every sample was then determined at the laboratory for geoecology of Jena University using a loss-on-ignition method (DIN 19684-3).

Related to:

Kreutziger, Yvonne (2006): Rückkopplungseffekte verschieden diverser Grünlandökosysteme auf die Komponenten des Bodenwasserhaushalts an einem Auestandort der Saale. Friedrich-Schiller University Jena: Jena, Germany

Further details:

Plot information of the Jena Main Experiment

Treatment description

Project(s):

The Jena Experiment (JenExp)

Coverage:

Latitude: 50.946100 * Longitude: 11.611300

Date/Time Start: 2002-01-01T00:00:00 * Date/Time End: 2002-12-31T00:00:00

Minimum DEPTH, soil: 0.05 m * Maximum DEPTH, soil: 0.90 m

Event(s):

JenExp_2002 (Jena Experiment 2002) * Latitude: 50.946100 * Longitude: 11.611300 * Date/Time Start: 2002-01-01T00:00:00 * Date/Time End: 2002-12-31T00:00:00 * Location: Thuringia, Germany * Method/Device: Experiment (EXP)

Comment:

The main experiment on the field site of the Jena Experiment comprises a split-plot design in which additional treatments (e.g. no weeding allowing for invasion of other species, or application of fertilizer) have been applied to subplots along the outer margin of the plots (see Treatment description in the section "further details"). While in this dataset only data from the core area (mown and weeding of all none-sown species twice a year, no additional treatments) is reported, all potential treatments are listed as the first parameters in the data file to guarantee compatibility with other datasets that include different treatments.

There are two types of missing values contained in the dataset. Empty cells represent missing values that result from the design of the experiment when the respective value does not occur and could thus not be measured. For example, in the columns of species-specific biomass cells are left blank, when the species was not sown into the respective plot. Missing values that resulted from methodological problems, sampling errors, or lost samples/data are marked with "-9999".

This dataset is part of a collection of physical and chemical soil properties in the Jena Experiment. Similar data from other experiments (e.g. Main Experiment, Dominance Experiment; see details above), other years, or other methods quantifying related data might be available (https://doi.pangaea.de/10.1594/PANGAEA.885439).

Parameter(s):

#	Name	Short Name	Unit	Method/Device	Comment
1	Experimental plot	Experimental plot			Detailed explanations of plots and the plant diversity gradient are provided in the section "further details".
2	Organic content	Org cont	%	Loss of ignition (DIN 19684, Part 3)	Measured on plot level
3	Depth, soil, minimum	Depth soil min	m
4	Depth, soil, maximum	Depth soil max	m
5	DEPTH, soil	Depth soil	m		Geocode
6	Date/time start	Date/time start			of sampling campaign
7	Date/time end	Date/time end			of sampling campaign
8	Treatment: mowing	T:mow			Detailed explanations of treatments are provided in the section "further details".
9	Treatment: weeding	T:weed			Detailed explanations of treatments are provided in the section "further details".
10	Treatment: weeding history	T:weed hist			Detailed explanations of treatments are provided in the section "further details".
11	Treatment: seed addition	T:seed add			Detailed explanations of treatments are provided in the section "further details".
12	Treatment: fertilizing	T:fert			Detailed explanations of treatments are provided in the section "further details".
13	Treatment: drought	T:drought			Detailed explanations of treatments are provided in the section "further details".
14	Treatment: aboveground: pesticide	T:abovegr pest			Detailed explanations of treatments are provided in the section "further details".
15	Treatment: below pesticide	T:below pest			Detailed explanations of treatments are provided in the section "further details".
16	Treatment: molluscide	T:mollus			Detailed explanations of treatments are provided in the section "further details".
17	Treatment: nematicide	T:nema			Detailed explanations of treatments are provided in the section "further details".
18	Treatment: eartworm exclosure	T:eartworm excl			Detailed explanations of treatments are provided in the section "further details".
19	Treatment: phytometers	T:phyto			Detailed explanations of treatments are provided in the section "further details".
20	Treatment: special	T:special			Detailed explanations of treatments are provided in the section "further details".
21	Height, minimum	Height min	m		Soil surface
22	Height, maximum	Height max	m		rough approximation of maximum vegetation height
23	Height	Height	m

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

12474 data points

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