A Comparison of Analytical Methods for the Determination of Soil pH: Case Study on Burned Soils in Northern Portugal - Faria M; Bertocco T; Barroso A; Carvalho M; Fonseca F; Delerue Matos C; Figueiredo T; Sequeira Braga A; Valente T; Jiménez-Ballesta R (Fire, 2023)