IRRIGATION AND NITROGEN EFFECTS ON OIL YIELD AND NITROGEN UPTAKE BY ETHIOPIAN MUSTARD (BRASSICA-CARINATA)

An experiment conducted in sandy-loam soil of New Delhi during the win ter season (rabi) 1989-90 and 1990-91 revealed that oil cotent in seed of Ethiopian mustard (Brassica carinata A. Braun) increased up to irr igation water (IW) : cumulative pan evaporation (CPE) ratio of 0.6, bu t decreased with increasing levels of applied nitrogen. It was inverse ly related to seed N content. Crop irrigated at an IW : CPE of 0.6 and fertilized with 100 kg N/ha gave the maximum yield (7.7 q/ha), but hi ghest quantity of N (92.5 kg/ha) was accumulated in the plants which r eceived 150 kg N/ha Ethiopian mustard accumulated on an average 45.5 k g N/ha in plant parts to produce I tonne seeds/ha of which about 73% w as harvested in seeds.