TY - Generic T1 - Options for reducing the negative effects of nitrogen in agriculture Y1 - 2005 A1 - Freney, J. R. KW - ammonia volatilization KW - condensed tannins KW - lotus-corniculatus KW - lowland rice KW - n2o emissions KW - nitrification inhibitors KW - nitrogen in agriculture KW - options for reducing the negative effects KW - oxide emissions KW - trail hoses KW - use efficiency KW - wool production JF - Science in China Series C-Life Sciences VL - 48 ER -