The investigation was carried out on tropical sugar beet during the kharif, 2010 at Agricultural research station, Madhurakhandi of University of Agricultural Sciences, Dharwad (Northern dry zone of Karnataka) to study the influence of sources of nitrogen (S1, S2, S3, S4 and S5) and organic liquid manures (L1, L2, L3, L4 and L5) on growth, yield and quality of tropical sugar beet. The experiment was laid out in split plot design with three replications where in sources of nitrogen and organic liquid manures were assigned to main and subplot, respectively. Among the sources of nitrogen, significantly higher tuber yield (79.40 t ha-1) and sugar yield (8.75 t ha-1) were recorded with treatment which received 100% RDN through inorganic nitrogen (S1). All the organic liquid manure treatments did not differ significantly, but differed significantly with that of control (no spray). Interaction results clearly revealed that application of 100 per cent RDN (120kg ha-1) through inorganic nitrogen along with foliar spray of vermiwash (20 %) and cow urine (10 %) at 30 and 60 DAS (S1 x L4) was found optimum for getting higher sugar beet tuber yield (82.47 t ha-1), sugar yield (8.70 t ha-1), net returns (Rs. 53880 ha-1) and B:C ratio (2.20).