| Attribute Name -- Attribute Label |
Unit |
Attribute definition |
datetime
--
Date and Time
|
not mapped |
The date and time |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Date daily (YYYY-MM-DD) |
|
Description
:
|
Date daily (YYYY-MM-DD) |
|
|
SampleID
--
ID of the sample
|
no unit |
ID of the sample |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Unique sample ID |
|
Description
:
|
Unique sample identification number |
|
|
PlotID
--
ID of the plot
|
no unit |
ID of the plot |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Plot ID in NUMEX |
|
Description
:
|
Plot ID in NUMEX |
|
|
PlotTreat
--
Treatment of the plot
|
no unit |
Treatment of the plot with respect to experiments |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Treatment in NUMEX |
|
Description
:
|
Treatment in NUMEX plots (control, N, P, NP, Ca) |
|
|
Clw_sc15
--
Chloride measured in suction cups 15cm depth
|
Milligram per liter |
Chloride measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of chloride concentrations |
|
Description
:
|
Chloride measured in acqueous samples by continuous flow analysis (CFA) and ion-selective electrode (ISE). |
|
Instrumentation:
|
Instrument:
Description: Measurement of Cl concentration by continuous flow analysis (CFA) and ion selective electrode (ISE) in presence of an ionic strength adjustment buffer (NaNO3)
|
Instrument: Continuous Flow Analyzer / Ion selective electrode
|
Vendor: Seal, Norderstedt and Skalar, Breda / ThermoFisher, Beverly
|
|
|
|
PO4w_sc15
--
Ortho-phosphate (reactive phosphorus) measured in suction cups 15cm depth
|
Milligram of phosphorus per liter |
Ortho-phosphate (reactive phosphorus) measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of phosphate concentrations |
|
Description
:
|
Concentrations of orthophosphate (oPO4-P) measured by continuous flow analysis (CFA) using high resolution colorimetry and photometric detection. Ammonium heptamolybdate and potassium antimony(III) oxide tartrate react in an acidic medium with dialysed and diluted solutions of phosphate to form an antimony-phospho-molybdate complex. This complex is reduced to an intensely blue-coloured complex by L(+)ascorbic acid. The complex is measured at 880 nm. |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Continuous Flow Analyzer
|
Vendor: Seal, Norderstedt and Skalar, Breda
|
|
|
|
Ptotw_sc15
--
Total phosphorus measured in suction cups 15cm depth
|
Milligram of phosphorus per liter |
Total phosphorus measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of total phosphorus concentrations |
|
Description
:
|
Concentrations of total dissolved phosphorus (TP), measured by continuous flow analysis (CFA) using high resolution colorimetry and photometric detection. The sample is mixed with a potassium peroxodisulfate and organic phosphates are destructed by means of UV digestion. Sulfuric acid is added to the sample stream and the solution and complex inorganic phosphates are digested at 110 °C to ortho-phosphate. Sodium hydroxide is added to neutralise the solution which is dialysed against distilled water. Ammonium heptamolybdate catalysed by potassium antimony(III) oxide tartrate reacts in an acidic medium with diluted solutions of phosphate to form a phospho-molybdic acid complex. This complex is reduced in an intensely blue colored complex by L(+)ascorbic acid. This complex is measured at 880 nm. |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Continuous Flow Analyzer
|
Vendor: Seal, Norderstedt and Skalar, Breda
|
|
|
|
NH4w_sc15
--
Ammonium measured in suction cups 15cm depth
|
Milligram of nitrogen per liter |
Ammonium measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of ammonia concentrations |
|
Description
:
|
Concentrations of ammonium-N (NH4-N) measured by continuous flow analysis (CFA) using high resolution colorimetry and photometric detection. During the CFA measurements, samples were dialyzed on-line and NH4-N was determined by the Berthelot reaction. Ammonia is buffered and chlorinated to monochloramine which reacts with salicylate to 5-aminosalicylate. After oxidation and oxidative coupling a green coloured complex is formed. The absorption of the formed complex is measured at 660 nm. |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Continuous Flow Analyzer
|
Vendor: Seal, Norderstedt and Skalar, Breda
|
|
|
|
NO3w_sc15
--
Nitrate measured in suction cups 15cm depth
|
Milligram of nitrogen per liter |
Nitrate measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of nitrate concentrations |
|
Description
:
|
Nitrate-N (NO3-N) measured by continuous flow analysis (CFA) using high resolution colorimetry and photometric detection. After on-line dialysis, the sample is buffered at pH 8.2 and is passed through a column containing granulated copper-cadmium to reduce the nitrate to nitrite, which is determined by diazotizing with sulfanilamide and coupling with N-(1-naphthyl)ethylenediamine dihydrochloride to form a highly coloured azo dye which is measured at 540 nm. The determination of NO3-N concentrations by cadmium reduction usually includes a small amount of originally present nitrite-N (NO2-N), which was below the detection limits and hence considered negligible. |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Continuous Flow Analyzer
|
Vendor: Seal, Norderstedt and Skalar, Breda
|
|
|
|
Ntotw_sc15
--
Total nitrogen measured in suction cups 15cm depth
|
Milligram of nitrogen per liter |
Total nitrogen measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of total nitrogen concentrations |
|
Description
:
|
Concentrations of total dissolved nitrogen (TN) measured by continuous flow analysis (CFA) using high resolution colorimetry and photometric detection. During the CFA measurements TN was oxidized to nitrate by UV digestion with potassium peroxydisulfate and sodium hydroxide in presence of a boric acid buffer. After dialysis the nitrate is reduced to nitrite by a cadmium copper reductor. The nitrite is determined by the Griess reaction, the colour is measured at 540 nm. |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Continuous Flow Analyzer
|
Vendor: Seal, Norderstedt and Skalar, Breda
|
|
|
|
Kw_sc15
--
Potassium measured in suction cups 15cm depth
|
Milligram per liter |
Potassium measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of potassium concentrations |
|
Description
:
|
Potassium concentrations measured by flame atomic absorption spectroscopy (F-AAS, ZEEnit 700P, AnalytikJena, Jena, Germany). |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Atom Absorption Spectrometer
|
Vendor: AnalyticJena
|
|
|
|
Naw_sc15
--
Sodium measured in suction cups 15cm depth
|
Milligram per liter |
Sodium measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of sodium concentrations |
|
Description
:
|
Sodium concentrations were measured by flame atomic absorption spectroscopy (F-AAS, ZEEnit 700P, AnalytikJena, Jena, Germany) after addition of 0.15% CsCl ionization buffer. |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Atom Absorption Spectrometer
|
Vendor: AnalyticJena
|
|
|
|
Mgw_sc15
--
Magnesium measured in suction cups 15cm depth
|
Milligram per liter |
Magnesium measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of magnesium concentrations |
|
Description
:
|
Magnesium concentrations were measured by flame atomic absorption spectroscopy (F-AAS, ZEEnit 700P, AnalytikJena, Jena, Germany). |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Atom Absorption Spectrometer
|
Vendor: AnalyticJena
|
|
|
|
Caw_sc15
--
Calcium measured in suction cups 15cm depth
|
Milligram per liter |
Calcium measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of calcium concentrations |
|
Description
:
|
Calcium concentrations were measured by flame atomic absorption spectroscopy with nitrous oxide as oxidant gas (F-AAS, ZEEnit 700P, AnalytikJena, Jena, Germany). |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Atom Absorption Spectrometer
|
Vendor: AnalyticJena
|
|
|
|
DOCw_sc15
--
Dissolved organic carbon measured in suction cups 15cm depth
|
Milligram per liter |
Dissolved organic carbon measured in suction cups 15cm depth (soil solution) time series |
|
Method
(Sampling/processing description of the values of
this attribute by one ore more steps.)
|
|
--- Step
1
---
|
|
Title
:
|
Measurement of total organic carbon concentrations |
|
Description
:
|
Total organic carbon (TOC) measured as non-purgeable organic carbon (NPOC) by elemental analysis through high temperature combustion and infrared (IR) detection (varioTOC cube, elementar Analysensysteme GmbH, Hanau, Germany), after acidifying 10 mL of the sample with 50 µL of a 10% HCl solution to remove inorganic C. |
|
Instrumentation:
|
Instrument:
Description:
|
Instrument: Elemental Analyzer (liquid mode)
|
Vendor: Elementar Analysensysteme, Hanau
|
|
|
|
