A. D JANAWADESANJEEVRADDI G. REDDI2019-06-202019-06-202007-10-01TH8709http://krishikosh.egranth.ac.in/handle/1/5810109257Two field experiments and one laboratory experiment were carried out for two years (2002-03 and 2003-04) to study the production potential of sweet sorghum genotypes for grain and ethanol production as influenced by management practices at Main Agricultural Research Station. Dharwad. The results revealed that the ethanol, green biomass, Juice and sugar yield and juice quality parameters like brix, pol percentage and reducing sugar of the juice were significantly higher in genotype NSSH-1 over rest of the genotypes. Genotypes SSV-84, SSV-74 and NSSH-1 produced significantly higher grain yield and yield components such as ear head length, grain weight ear-i and grain number ear-L During rabU 1®' fortnight of October sowing produced significantly higher grain yield (1569 kg ha fl and yield components, ethanol yield (211.4 1 ha fl, juice yield (567.3 1 ha fl, green biomass yield (191.8 t ha fl, sugar yield and quality parameters (brix and reducing sugar). Treatment combination of SSV-84, NSSH-1 and SSV-74 with 1®^ fortnight of October recorded significantly higher net returns (Rs. 9866, 9746 cind 9541, respectively). B:C ratio was maximum in treatment combination of SSV-84 and SSV-74 when sown at 1st fortnight of October (2.18 and 2.18). During kharif, sowing in 1st fortnight of June and 2"^ fortnight of June produced significantly higher grain yield and yield components, ethanol yield, juice yield, green biomass yield, sugar yield and quality characteristics. Combinations of NSSH-1 and SSV-84 with 1st fortnight of June sowing recorded significantly higher net returns (Rs. 9049 and Rs. 8961, respectively). Grain yield and yield components were significantly higher in 120 + 75 kg aiid 120 50 kg NK ha i fertility level. Ethanol yield (422.9 1 ha fl. sugar yield, extraction percentage were significantly higher in application of 120 + 75 kg NK hah Harvesting at milk stage produced significantly higher green biomass )deld and juice yield than other stages. Ethanol yield was maximum when harvesting at milk stage and physiological maturity stage (474.1 and 446.9 1 ha->, respectively). Both the genotypes £ind all the fertility levels with harvesting at physiological maturity stage recorded significantly higher net returns and B:C ratio over harvesting at 50 per cent flowering and milk stage. To summarize, for the transitional tract of Northern Karnataka sweet sorghum genotypes NSSH-1 (Madhura), SSV-84 and SSV-74 performed better in both kharif and rabi seasons with respect to grain yield, green biomass yield, juice yield and ethanol yield. Application of higher fertility level (120 + 75 kg NK ha-i) and harvesting at physiological maturity recorded maximum grain, green biomass, juice and ethanol yield. Two yeast strains (NCIM-3319 and local isolate) were significantly superior.ennullThesis