Effect of plant density and nitrogen levels on growth, yield attributes and yields of sweet sorghum (Sorghum bicolor (L.) Moench) genotypes.

A field experiment was conducted during rainy (Kharif) season of 2005 and 2006 at college of Agriculture, Indore (MP) to study the effect of plant density and nitrogen levels on growth, yield attributes and yields of sweet sorghum. The experiment was laid out in split plot design. Two genotypes viz. NSSH-104 and SSV-84 and two-plant densities (1.11 lakh and 1.48 lakh plants/ha) were in the main plot treatments and four nitrogen levels (30, 60, 90 and 120 kg ha−1) in the sub plot treatments. Plant density of 1.11 lakh plants/ha recorded maximum growth, dry matter/plant and yield attributing characters, while plant density of 1.48 lakh plants/ha was found optimum for higher yields, monetary returns and benefit cost ratio. Genotype NSSH-104 emerged as a promising genotype. Nitrogen level @ 120 kg ha−1 found suitable for the maximum growth, dry matter production, yield attributes, yields and monetary returns.