- Soil labile nitrogen pools for the Carbon action ACA experiment for year 2022 (4th year of experiment)(2023-06-13) Mattila, Tuomas; Girz, Andrei; Pihlatie, Mari; SYKE, Finnish Environment Institute - Mattila, Tuomas; SYKE, Finnish Environment Institute - Girz, Andrei; University of Helsinki - Pihlatie, Mari