A field experiment was conducted during summer season of year 2021 at College Agronomy Farm, B. A. College of Agriculture, Anand Agricultural University, Anand with a view to study the effect of spacing and nutrient management on yield and economics of summer blackgram (Vigna mungo L. Heeper) under organic conditions. The experiment consisted of twelve treatment combinations comprised of two different spacing related to main factor and six nutrient management practices allotted to sub factor and were tested under randomized block design with factorial concept and replicated thrice. Results revealed that crop sown at spacing 30 × 10 cm (S1) recorded significantly higher plant height, seed yield and haulm yield while, in case of number of branches/plant, dry weight of root nodules, plant dry biomass and root dry biomass were recorded significantly higher with crop sown at spacing 45 × 10 cm (S2). Application of 100% N through castor cake + seed treatment of Rhizobium recorded significantly higher growth and yield attributes viz., plant height, number of branches/plant, dry weight of nodules, plant and root dry biomass, pods/plant, length of pod, seeds/pod and seed index of blackgram. Further, higher net monetary returns of ` 35254/ha and benefit cost ratio of 2.12 were fetched under treatment combination of 100% N through castor cake + seed treatment of Rhizobium.

Blackgram, FYM, vermicompost, castor cake

From the results of one-year experimentation, it can be concluded that higher yield of summer blackgram could be achieved with sowing of crop at 30 × 10 cm spacing and fertilized with 100% N through castor cake and seed treatment with Rhizobium under organic conditions.

Ganvit K.J., Patel V.J. and Desai N.B. (2022). Effect of Spacing and Nutrient Management on Yield and Economics of Summer Blackgram (Vigna mungo L. Heeper) under Organic conditions. Biological Forum – An International Journal, 14(3): 1637-1641.