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Title:
Main Experiment: Cation exchange capacity, base saturation and soil fertility attributes of depth increments on Site B (2010-2011)
Access rights:
Free for members
Usage rights:
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Published:
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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.
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
Measurement cirumstances:
No information available
Data analysis:
No information available

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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 B, location
Values:
E24
D28
E27
D29
E26
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-D28-1
EXPB-S-D28-2
EXPB-S-D28-4
EXPB-S-D28-3
EXPB-S-D28-5
Contributors:

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:
21029
21027
21030
21028
21026
Contributors:

Dataset column

Name:
depth_lb
Definition:
depth (lower boundary) of the sample
Unit:
cm
Datagroup:
Soil depth
Keywords:
soil, soil depth
Values:
40
10
20
30
5
Contributors:
No information available

Dataset column

Name:
IE_Na
Definition:
ion equivalent (IE) of element
Unit:
µmolc/g
Datagroup:
Exchangable cations
Keywords:
Na
Values:
0.26122046051986864
0.26020364414460473
0.2600325565293334
0.26004827077162607
< 0.26
Contributors:

Dataset column

Name:
IE_K
Definition:
ion equivalent (IE) of element
Unit:
µmolc/g
Datagroup:
Exchangable cations
Keywords:
K
Values:
0.30242348967302146
0.3027039592242459
0.3207396443414322
< 0.30
0.30977664098850644
Contributors:

Dataset column

Name:
IE_Mg
Definition:
ion equivalent (IE) of element
Unit:
µmolc/g
Datagroup:
Exchangable cations
Keywords:
Mg
Values:
0.24710026532713425
0.23805192769736844
0.22811377255639098
0.2708509735863095
0.23793137124154512
Contributors:

Dataset column

Name:
IE_Ca
Definition:
ion equivalent (IE) of element
Unit:
µmolc/g
Datagroup:
Exchangable cations
Keywords:
Ca
Values:
0.1424156267110049
0.12026230815762803
0.18700020620758487
0.17119779587650097
0.16971019457101733
Contributors:

Dataset column

Name:
IE_Mn
Definition:
ion equivalent (IE) of element
Unit:
µmolc/g
Datagroup:
Exchangable cations
Keywords:
Mn
Values:
0.0652577802764306
0.04261869426183287
0.053963090283194945
0.05429273553554024
0.06579058223516564
Contributors:

Dataset column

Name:
IE_Fe
Definition:
ion equivalent (IE) of element
Unit:
µmolc/g
Datagroup:
Exchangable cations
Keywords:
Fe
Values:
0.0011654944565723155
0.0002871096622604899
0.00044434816498388827
0.001552828759727306
0
Contributors:

Dataset column

Name:
IE_Al
Definition:
ion equivalent (IE) of element
Unit:
µmolc/g
Datagroup:
Exchangable cations
Keywords:
Al
Values:
18.85609307867972
12.318701824850555
10.834358486907496
16.08259240464863
16.708228360741682
Contributors:

Dataset column

Name:
IE_H
Definition:
ion equivalent (IE) of element
Unit:
µmolc/g
Datagroup:
Exchangable cations
Keywords:
H
Values:
0.5255366761286416
0.3259898618535397
0.3748589725206345
0.2654331688452884
0.5255287874797665
Contributors:

Dataset column

Name:
CECeff
Definition:
effective cation exchange capacity
Unit:
µmolc/g
Datagroup:
Exchangable cations
Keywords:
cation exchange capacity
Values:
108.75231548874679
34.2709146101465
34.90697176881521
34.13780064111133
36.05543846912164
Contributors:

Dataset column

Name:
BS
Definition:
base saturation, ratio between 0 and 100 %, sum of IEs(Na, K, Mg, Ca); as percentage of CECeff
Unit:
%
Datagroup:
Base saturation
Keywords:
base saturation
Values:
10.07085099141561
10.042445217295407
10.068721875641854
10.054314733130276
10.08841697111508
Contributors:

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