Total N was measured using the Kjeldahl digestion method. Nitrate N and ammonium N were determined by colorimetric spectrophotometry using indophenol blue and phenol disulfonic acid. Soil pH was ...

Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Cracow, Poland Jagiellonian University, Doctoral School of Exact and Natural Sciences, Łojasiewicza 11, 30-348 Cracow, Poland ...