Effect of NP fertilizers, vermicompost and sulphur on growth, yield and quality of clusterbean [Cymopsis tetragonoloba (L.)] and their residual effect on grain yield of succeeding wheat [Triticumaestivum(L)]

A field experiment was conducted during 2004–05 and 2005–06 at Agricultural Research Station, Durgapura, Jaipur to study the effect of NP fertilizers, vermicompost and sulphur on growth, yield attributes, yield and quality of clusterbean [Cymopsis tetragonoloba (L.) Taub.] and residual effect of NP fertilizers, vermicompost and sulphur on grain yield of succeeding wheat [Triticum aestivum (L.) emend. Bori & Paol.]. Application of NP fertilizers up to 75% of RDF (15 kg N + 30 kg P₂O₅/ha) recorded significantly higher seed yield, gum content and gum yield by 46.99 and 14.88, 11.06 and 5.26 and 63.53 and 20.29 per cent over control and 50% of RDF, respectively. Vermicompost application @ 2.0 t/ha significantly increased the yield attributes of clusterbean viz., pods per plant, seeds per pod, pod length and test weight and seed, straw and biological yields of clusterbean over vermicompost @ 1.0 t/ha. Further, the successive increase in sulphur up to 40 kg S/ha recorded significantly higher seed and straw yields of clusterbean. The combined application of NP fertilizers @ 75% of RDF and vermicompost @ 2.0 t/ha significantly improved the pods per plant and seed yield of clusterbean. The 100% of RDF, vermicompost @ 2.0 t/ha and sulphur @ 60 kg S/ha applied to clusterbean recorded significantly higher grain yield of succeeding wheat crop by 21.54, 12.04 and 21.09 over control, respectively.