Beretta, A. et al. 2015. Soil pH Measurement with Reactive Paper Test Agrociencia Uruguay - Volumen 19 2:68-74 - julio/diciembre 2015 The pH test papers (strips) may be useful for measuring soil pH. The pH values for. Agrociencia Uruguay. 19, 2 (Dec. 2015), 68–74. DOI:https://doi.org/10.31285/AGRO.19.303.