Research theme for competitive and other funds (2):
2002 - 2006 Breeding of Butterbur and Udo
2003 - 2005 Treatment of Udo and Asparagus Residue
Papers (21):
Takeharu Koizumi. Effects of Cultivar and Cropping Type on Growth and Yield of Spears and Sprouting from Greening. Hort. Res. (Japan). 2013. 12. 4. 397-401