Sensing and Visualization in Agriculture with Affordable Smart Devices Takashi Okayasu, Andri PrimaNugroho, Daisaku Arita, Takashi Yoshinaga, Yoshiki Hashimoto, and Rin-ichiro Tachiguchi 1 Introduction Agriculture is a highly complex system that depends on the climate, weather, soil conditions, plant types, and so on. Thus, farmers have attempted to modify cultiva- tion techniques to fit the ambient weather conditions and geographical factors using T. Okayasu () Faculty of Agriculture, Department of Agro-environmental Sciences, Kyushu University, 6-10-1, Hakozaki, Higashi, Fukuoka 812-8581, Japan e-mail: okayasu@bpes.kyushu-u.ac.jp A.P. Nugroho Faculty of Agricultural Technology, Department of Agricultural and Biosystems Engineering, Universitas Gadjah Mada, Jl. Flora No 1 Bulaksumur, Yogyakarta 55281, Indonesia e-mail: andrew@ugm.ac.id D. Arita Faculty of Information Systems, Department of Information Systems, University of Nagasaki, 1-1-1, Manabino, Nagayo, Nishisonogi, Nagasaki 851-2195, Japan Institute of Systems, Information Technologies and Nanotechnologies, 2-1-22, Momochihama, Sawara, Fukuoka 814-0001, Japan e-mail: arita@sun.ac.jp T. Yoshinaga Institute of Systems, Information Technologies and Nanotechnologies, 2-1-22, Momochihama, Sawara, Fukuoka 814-0001, Japan e-mail: yoshinaga@isit.or.jp Y. Hashimoto Department of Advanced Information Technology, Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka Nishi, Fukuoka 819-0395, Japan e-mail: hashimoto@limu.ait.kyushu-u.ac.jp R. Tachiguchi Faculty of Information Science and Electrical Engineering, Department of Advanced Information Technology, Kyushu University, 744 Motooka Nishi, Fukuoka 819-0395, Japan e-mail: rin@kyudai.ac.jp © Springer International Publishing AG 2017 H. Yasuura et al. (eds.), Smart Sensors at the IoT Frontier, DOI 10.1007/978-3-319-55345-0_12 299