BEF-China | Main Experiment: Soil CNS and pH analyses of depth increments on Site B (2010-2011)

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Title:

Main Experiment: Soil CNS and pH analyses of depth increments on Site B (2010-2011)

Access rights:

Free for public

Usage rights:

No information available

Published:

No information available

Abstract:

Soil chemical laboratory analyses of all plots on Site B. Contents of carbon, nitrogen and sulphur as well as pH-values (in H2O and KCl) of depth increments per plot.

Design:

At the beginning, six depth increments were taken from systematic corings: Nine corings per plot were pooled to one sample per depth increment (0-5, 5-10, 10-20, 20-30, 30-40, 40-50 cm). Sampling was then reduced to five depth increments (0-5, 5-10, 10-20, 20-30, 30-50 cm). Samples were air-dried, sieved < 2mm, grinded using a ball mill. Subsamples of 40 mg were used for measurements with an elemental analyzer (Vario EL III, Elementar, Hanau, Germany).

Spatial extent:

Experimental Site B 29°08'-29°11'N 117°90'-117°93'E

Temporal extent:

Samples were collected from 2010 to 2011. Lab analyses were carried out from 2010 to 2012.

Taxonomic extent:

No organisms

Measurement cirumstances:

No information available

Data analysis:

pH (KCl) is the maximum potential acidity under present soil conditions. pH (H2O) is the current acidity.

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Dataset column

Name:

plot_number

Definition:

Plot Letter Code; Datagroup description: Plot name (letter, number code)

Unit:

No information available

Datagroup:

Plot name Main experiment (letter, number code)

Keywords:

Site A, location

Values:

D25
D28
D27
D26
C27

Contributors:

No information available

Dataset column

Name:

sample_num

Definition:

field name of the sample; Datagroup description: Helper

Unit:

No information available

Datagroup:

Identifier

Keywords:

soil base

Values:

EXPB-S-C27-5
EXPB-S-C27-2
EXPB-S-C27-4
EXPB-S-C27-1
EXPB-S-C27-3

Contributors:

Geißler, C., Goebes, P.

Dataset column

Name:

lab_num

Definition:

laboratory number of laboratory of soil science and geoecology in Tübingen; Datagroup description: Laboratory number of Laboratory of Soil Science and Geoecology in Tübingen

Unit:

No information available

Datagroup:

Laboratory number of Laboratory of Soil Science and Geoecology in Tübingen

Keywords:

soil base

Values:

21030
21028
21029
21027
21026

Contributors:

Flaiz, S.

Dataset column

Name:

depth_lb

Definition:

depth (lower boundary) of the sample; Datagroup description: Soil depth

Unit:

Datagroup:

Soil depth

Keywords:

soil, soil depth

Values:

40
20
5
30
10

Contributors:

No information available

Dataset column

Name:

pH_H2O

Definition:

pH value, mean from two values determined by H20 method. solutionH20 : soil = 2.5:1; Datagroup description: pH value; Instrumentation: electrodes Sentix 81 and WTW pH-meter (derived from datagroup); Instrumentation: electrodes Sentix 81 and WTW pH-meter (derived from datagroup)

Unit:

Datagroup:

pH value

Keywords:

pH, response variable

Values:

3.83
3.74
3.8
3.73
3.79

Contributors:

Flaiz, S.

Dataset column

Name:

pH_KCl

Definition:

pH value, mean from two values determined in 1 M KCL; Datagroup description: pH value; Instrumentation: electrodes Sentix 81 and WTW pH-meter (derived from datagroup); Instrumentation: electrodes Sentix 81 and WTW pH-meter (derived from datagroup)

Unit:

Datagroup:

pH value

Keywords:

pH, response variable

Values:

3.18
3.15
3.17
3.19
3.13

Contributors:

Flaiz, S.

Dataset column

Name:

N_t

Definition:

total organic nitrogen content; Datagroup description: Nitrogen; Instrumentation: Elemental Analyzer (derived from datagroup); Instrumentation: Elemental Analyzer (derived from datagroup)

Unit:

Mass-%

Datagroup:

Nitrogen

Keywords:

SON, nitrogen, response variable

Values:

0.05356123298406601
0.053823698312044144
0.05353284627199173
0.05206064134836197
0.04040925204753876

Contributors:

No information available

Dataset column

Name:

C_t

Definition:

total soil organic carbon content; Datagroup description: Carbon content

Unit:

Mass-%

Datagroup:

Carbon

Keywords:

SOC, carbon, response variable

Values:

0.277434766292572
0.2849503457546234
0.24051223695278168
0.2734487056732178
0.31280672550201416

Contributors:

No information available

Dataset column

Name:

S_t

Definition:

total sulphur content; Datagroup description: Sulphur; Instrumentation: heat combustion and thermal conductivity detection using a CNS-Elementar analyser, varioEL III from Elementar (derived from datagroup); Instrumentation: heat combustion and thermal conductivity detection using a CNS-Elementar analyser, varioEL III from Elementar (derived from datagroup); Datagroup description: S content

Unit:

Mass-%

Datagroup:

Sulphur

Keywords:

S, response variable

Values: