Assessing The Effect of Nitrogen and Harvesting Stages on Yield and Yield Attributes of Sweet Sorghum Genotypes

A field experiment was conducted at Agricultural Research Station, (UAS) Kathalagere, during kharif,2007 on clay loam soil under rainfed conditions to study the effect of nitrogen and harvesting stages on yield and yield attributes of sweet sorghum genotypes. Results revealed that genotype SSV-84 recorded significantly higher grain yield (2237.1 kg ha⁻¹) which was 24.60% more than that of SSV-74 (1795.3 kg ha⁻¹). Application of 81.25 kg ha⁻¹ of nitrogen (125% of recommended dose of nitrogen) recorded significantly higher values of earhead weight (80.7 g),grain weight per earhead (59.2 g),stalk yield (32.62 t ha⁻¹) and grain yield (2116.5 kg ha⁻¹) than that of 100% RDN (65 kg ha⁻¹) and 75% RDN (48.75 kg ha⁻¹).Results further indicated that harvesting of sweet sorghum at physiological maturity was found the most viable stage as it recorded significantly higher earhead length (26.2 cm),ear head weight (86.8 g), grain weight per ear (62.8 g), 1000 seed weight (30.4 g) and stalk yield (34.11 t ha⁻¹) over other harvesting schedules i.e., milky to dough and full maturity stages.