Analysis of total C and N concentrations in soil and plant samples, using CN analyzer (Elementar Vario EL; Elementar Analysis Systems GmbH, Hanau, Germany)
Soil processing for effective cation exchange capacity of mineral soils by NH4Cl percolation
Soil processing for total element concentrations of soil organic layer and plant samples by HNO3 pressure digestion
Oxalate extractions of mineral soils for active Si, Al and Fe (e.g. non-crystalline minerals, poorly crystalline oxides, interlayer and exchangeable Al or Fe, and partly organically-bound Al or Fe)
Pyrophosphate extractions of mineral soils for organically-bound Al and Fe
Analysis and calculations of element concentrations in soil extracts (e.g. effective cation exchange capacity, oxalate extracts for active Al/Fe, pyrophosphate extracts for organically-bound Al/Fe), in soil organic layer and plant samples (e.g. extracts from HNO3 pressure digestion) and in water samples, using inductively coupled plasma-atomic emission spectrometer (iCAP PRO XP Duo ICP-OES Spectrometer, Thermo Fischer Scientific GmbH, Dreieich, Germany)
Analysis and calculations of N concentrations of different N pools in soil extracts and water samples, using continuous flow injection colorimetry (SEAL Analytical AA3, SEAL Analytical GmbH, Norderstedt, Germany)
