EFFECT OF NITROGEN APPLICATION ON HERB YIELD, NITROGEN UPTAKE AND NITROGEN RECOVERY IN JAVA']JAVA CITRONELLA (CYMBOPOGON-WINTERIANUS JOWITT)

A field experiment of Java citronella conducted for two years during 1982-84 at the Central Institute of Medicinal and Aromatic Plants, Bangalore [India] showed that application of 375 kg N/ha/year resulted in the highest herb yield and nitrogen uptake. The apparent N recoveries of Java citronella were very low (ranging from 11 to 17%). Application of nitrogen at six equal splits at two monthly intervals resulted in significantly higher herb yield, N uptake and apparent N recovery in comparison with other times of N application.