Main Experiment: Cation exchange capacity, base saturation and soil fertility attributes of depth increments on Site B (2010-2011)

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Dataset Abstract

Soil chemical laboratory analyses of VIPs and selected plots on Site B. Cation exchange capacity, base saturation and soil fertility attributes of six depth increments per plot.

Dataset Design

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.

Cation exchange capacity (CEC) and concentrations of Na, K, Mg, Ca, Mn, Fe, Al and H were measured with an ICP-OES (Perkin Elmer DV 5300 ICP OES). The soil samples were percolated with an unbuffered 1 M NH4Cl solution (effective cation exchange capacity). Base saturation percentage (BS) was calculated as proportion of the CEC accounted for by exchangeable bases Na, K, Mg and Ca.

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

Data columns available in the raw data part of this dataset

plot_number
Plot Letter Code; Datagroup description: Plot name (letter, number code)
Data group: Plot name Main experiment (letter, number code)
Keywords: Site B, location
Values
E26
D28
E24
E27
D29
sample_num
field name of the sample; Datagroup description: Helper
Data group: Identifier
Keywords: soil base
Values
EXPB-S-D28-3
EXPB-S-D28-4
EXPB-S-D28-5
EXPB-S-D28-1
EXPB-S-D28-2
* Geißler, C., Goebes, P. also contributed to this column.
lab_num
laboratory number of laboratory of soil science and geoecology in Tübingen; Datagroup description: Laboratory number of Laboratory of Soil Science and Geoecology in Tübingen
Data group: Laboratory number of Laboratory of Soil Science and Geoecology in Tübingen
Keywords: soil base
Values
21027
21030
21026
21029
21028
* Flaiz, S. also contributed to this column.
depth_lb
depth (lower boundary) of the sample
Unit: cm
Data group: Soil depth
Keywords: soil, soil depth
Values
30
20
10
5
40
IE_Na
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: Na
Values
0.26122046051986864
0.26020364414460473
0.2600325565293334
0.26004827077162607
< 0.26
* Flaiz, S. also contributed to this column.
IE_K
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: K
Values
0.30977664098850644
0.3207396443414322
0.30242348967302146
< 0.30
0.3027039592242459
* Flaiz, S. also contributed to this column.
IE_Mg
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: Mg
Values
0.23805192769736844
0.2708509735863095
0.22811377255639098
0.23793137124154512
0.24710026532713425
* Flaiz, S. also contributed to this column.
IE_Ca
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: Ca
Values
0.18700020620758487
0.16971019457101733
0.17119779587650097
0.12026230815762803
0.1424156267110049
* Flaiz, S. also contributed to this column.
IE_Mn
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: Mn
Values
0.06579058223516564
0.0652577802764306
0.053963090283194945
0.04261869426183287
0.05429273553554024
* Flaiz, S. also contributed to this column.
IE_Fe
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: Fe
Values
0.0002871096622604899
0
0.0011654944565723155
0.001552828759727306
0.00044434816498388827
* Flaiz, S. also contributed to this column.
IE_Al
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: Al
Values
12.318701824850555
18.85609307867972
16.708228360741682
10.834358486907496
16.08259240464863
* Flaiz, S. also contributed to this column.
IE_H
ion equivalent (IE) of element
Unit: µmolc/g
Data group: Exchangable cations
Keywords: H
Values
0.5255366761286416
0.3259898618535397
0.5255287874797665
0.2654331688452884
0.3748589725206345
* Flaiz, S. also contributed to this column.
CECeff
effective cation exchange capacity
Unit: µmolc/g
Data group: Exchangable cations
Keywords: cation exchange capacity
Values
36.05543846912164
34.2709146101465
108.75231548874679
34.90697176881521
34.13780064111133
* Flaiz, S. also contributed to this column.
BS
base saturation, ratio between 0 and 100 %, sum of IEs(Na, K, Mg, Ca); as percentage of CECeff
Unit: %
Data group: Base saturation
Keywords: base saturation
Values
10.042445217295407
10.07085099141561
10.08841697111508
10.054314733130276
10.068721875641854
* Flaiz, S. also contributed to this column.