• Chefetz B, Hatcher PG, Hadar Y, Chen Y 1998: Characterization of dissolved organic matter extracted from composted municipal solid waste. Soil Sci. Soc. Am. J., 62, 326332.
  • Matsuo K, Nonaka K 2002: Amendment of water quality of discharge from tea field by irrigation to bare paddy field. Tokai, J. Crop Sci, 132&133, 15 (in Japanese).
  • Nira R, Atsumi K 2007: Winter paddy field flooded with stream water with high nitrate concentration. Jpn. J. Soil Sci. Plant Nutri., 78, 299302 (in Japanese).
  • Paul EA, Clark FE 1989: Soil Microbiology and Biochemistry, p. 159, Academic Press, San Diego, California, USA.
  • Starr RC, Gillham RW 1993: Denitrification and organic carbon availability in two aquifers. Ground Water, 31, 934947.
  • Tabuchi T, Kuroda H, Shimura M 2001: Experiment on nitrate removal in a flooded paddy field. J. Jpn. Soc. Soil Phys., 87, 2736 (in Japanese with English summary).
  • Tsunekawa A, Imai K, Shibayama H, Kasuya M, Eguchi S 2006: Denitrification in the subsoil of paddy fields along the basin of the lower stream of the River Yahagi. Jpn. J. Soil Sci. Plant Nutri., 77, 207211 (in Japanese).