Agricultural Research Journal

A field experiment was conducted during kharif season of 2013 to study the effect of organic and inorganic sources of nutrients on yield and economics of blackgram. The results indicated that application of 100% RDF+Zn+Fe (N:P:K- 20:30:15 kg ha⁻¹ + ZnSO₄ 5 kg ha⁻¹ + FeSO₄ 5 kg ha⁻¹) recorded significantly highest plant height (34.18 cm), dry matter (10.31 g plant⁻¹), leaf area index (2.2), number of pods (32.48 plant⁻¹), number of seeds (6.9 pod⁻¹), seed yield (870 kg ha⁻¹), straw yield (1843 kg ha⁻¹), biological yield (2713 kg ha⁻¹), harvest index (32.1%), gross return (`50975), net return (`34930 ha⁻¹) and B-C ratio (3.2), respectively over rest of the treatments but it was at par with 100% RDF, 50% RDF+50% RDN through FYM and FYM 4 t ha⁻¹. The seed yield and net return of blackgram significantly increased by 8.85 and 11.2 per cent, respectively over 100% RDF. Split dose of vermicompost indicate that split application of vermicompost 1.0 t ha⁻¹ at 30 DAS along with FYM 2.0 t ha⁻¹ (Basal) recorded a significant increase yield and net returns of blackgram over vermicompost 1.0 t ha⁻¹ (Basal)+vermicompost 1.0 t ha⁻¹ at 30 DAS and control, respectively.