00616nam a2200133Ia 4500008004100000082005000041100004300091245011700134260006700251300000700318942000700325952013300332999001700465140113s9999    xx            000 0 und d  a631.816.84:633.18:621.089.85(213)(047.3)   L3  a"Tokeo, Koyana and Chittana, Chammek."  aNitrogen application technology for tropical rice as determined by firld experiments using 15 N tracer technique  a1973b"Trop.Agric. Res.Centre, Min.of Agric.& Forestry"cJapan  a79  cBK  00104070aVTLbVTLd2014-01-13l0o631.816.84:633.18:621.089.85(213)(047.3)   L3pVBK1806r2014-01-13 00:00:00w2014-01-13yBK  c58485d58485