Anan, T., 2003, Effects of nitrogen fertilizer on the constituents of new shoots in tea cultivars ‘Yabukita’,‘Sayamakaori’,‘Kanayamidori’ and ‘Meiryoku’. Bull. Natl. Res. Inst. Tea (Jpn.), 96, 33-47.
Goto, T., Uosumi, J., Suzuki, T., 1986, Near infrared spectroscopic analysis of total nitrogen content in green tea “Sen-cha”. Bull. Shizuoka Tea Exp. Stn., 12, 61-68.
Horio, M., Hishimura, Y., Ichigawa, T., Hayashi, K., Goto, T., Lizuka, K., Tanaka, H., Okunishi, Y., 2002, Development of handy-type crop growth measuring device. Jpn. J. Crop Sci., 71(2), 126-127.