eng Enviro Research Publishers Current Agriculture Research Journal 2347-4688 2321-9971 2018-04-20 6 1 65 71 3486 article D. Mahata 1 P. S. Patra 2 A. C. Sinha 3 A. K. Singha Roy 3 S. Bandyopadhyay 3 Gramin Krishi Mousam Sewa, AMFU-Pundibari, Uttar Banga Krishi Viswavidyalaya, Cooch Behar Assistant Professor (Agronomy), Regional Research Station, Terai Zone, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal, India. Department of Agronomy, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal, India. The research programme was carried out during early summer seasons of 2012 and 2013 at the experimental farm of Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar to study the direct and left over effect of organics on Buckwheat (Fagopyrum esculentum Moench) – fodder Rice bean (Vigna umbellata) cropping system. The trial was carried out in Randomized block design with 14 treatments and replicated thrice. Results demonstrate that combined application of vermicompost, poultry manures, mustard cake and farmyard manure improved seed yield of buck wheat by 0.51 and 0.53 t ha^-1 over 100 % RDF in 2012 and 2013, respectively. Among the sole application of organic manures, application of poultry manure at 5 t ha^-1 proved its superiority in terms of stem and seed yield of buck wheat. Collective application of vermicompost at 2.5 t ha^-1 + mustard Cake at 2.5 t ha^-1 + poultry manure at 2.5 t ha^-1 +  Farmyard manure at 4 t ha^-1  to the preceding buckwheat crop produced 18.67 and 17.20% more fodder yield of ricebean than 100 % chemically treated plot during both the years. Application of vermicompost at 2.5 t ha^-1 + mustard Cake at 2.5 t ha^-1 + poultry manure at 2.5 t ha^-1 +  Farmyard manure at 4 t ha^-1  also leave  highest amount of  available N, P and K in the soil. Economic analysis revelaed that treatment producing highest yield of buck wheat and ricebean fetched lower B: C ratio (0.63 and 0.74 during 2012 and 2013, respectively) as compared to other treatemnts. http://www.agriculturejournal.org/volume6number1/direct-and-residual-effect-of-organic-manure-on-buckwheat-fagopyrum-esculentum-moench-fodder-ricebean-vigna-umbellata-cropping-system/ Buckwheat; Mustard Cake; Organic Manure; Poultry Manure and Ricebean