1. Tools For Detecting and Control of Soil pH by Probe Sensor based on Android. (July 2019) Authors: Sihombing, Poltak; Peranginangin, Bisman; Sitompul, Dahlan; Rivaldo, Rido Journal: Journal of physics Issue: Volume 1230(2019) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗