Institute of Agricultural Information, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China;
Key Laboratory of Agri-Information Service Technology, Ministry of Agriculture, Beijing 100081, P.R.China;
National Library of Standards, China National Institute of Standardization, Beijing 100088, P.R. China;
Institute of Agricultural Information, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China;
Key Laboratory of Agri-Information Service Technology, Ministry of Agriculture, Beijing 100081, P.R.China;
Institute of Agricultural Information, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China;
Institute of Agricultural Information, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China;