TY - JOUR T1 - The effects of quantity and duration of simulated pollutant nitrogen deposition on root-surface phosphatase activities in calcareous and acid grasslands: a bioassay approach JO - NEW PHYTOL PY - 1999/03/01 AU - Johnson D AU - Leake JR AU - Lee JA ED - VL - 141 IS - 3 SP - 433 EP - 442 Y2 - 2024/12/22 ER -