5Hamrita TK, Hoffacker EC. Development of a "smart" wire- less soil monitoring sensor prototype using RFID technology [J]. Applied Engineering Agriculture, 2005, 21 ( 1 ) :139- 143.
6Ampatzidis YG, Vouqioukas SG. Field experiments for evalua- ting the incorporation of RFID and barcode registration and digital weighing technologies in manual fruit harvesting [ J ]. Computers and Electronics in Agriculture, 2009,66 ( 2 ) : 166 -172.
7Parsons J, Kimberling C, Parson G, Vet al. Colorado Sheep ID project: Using RFID or tracking sheep[ J ]. Journal of Ani- mal Science, 2005,83 : 119-120.
8Spiessl-Mayr E, Wend1 G, Zaehner M, et al. Electronic iden- tification ( RFID technology) for improvement of trace ability of pigs and meat[ J]. Precision Livestock Farming, 2005,50: 339 -345.
9Bishop-Huden GL, Sain DL, Anderson DM, et al. Virtual fencing applications: Implementing and testing an automated cattle control system[ J]. Computer and Electronics in Agri- culture, 2007,56 ( 1 ) :14-22.
10Nagl L, Sehmitz R, Warren S, et al. Wearable sensor sys- tem for wireless state- of-health determination in cattle [ C]//Proceedings of the 25th IEEE EMBS Conference. Cancun : IEEE EMBS, 17-21.
