AgriTalk: IoT for Precision Soil Farming of Turmeric Cultivation. - Wen-Liang Chen; Yi-Bing Lin; Yun-Wei Lin; Robert Chen; Jyun-Kai Liao; Fung-Ling Ng; Yuan-Yao Chan; You-Cheng Liu; Chin-Cheng Wang; Cheng-Hsun Chiu; Tai-Hsiang Yen (IEEE Internet Things J., 2019)