Grain yield and economics of mungbean (Vigna radiata L.) as influenced by different varieties and previous crops

A field experiment was conducted at the farmer's field to study the effect of previous crop on mungbean varieties yield during rabi 2016–17 at Sri Muktsar District of Punjab, India. In this experiment demonstrations were conducted with two mungbean varieties (SML 832 and SML 668) and growing after three previous crops (Potato, Wheat and Mustard). Among varieties, SML 832 gave higher grain yield (8.1 q/ha) over SML 668 (7.5 q/ha). SML 832 variety produced 8% higher grain yield from SML 668. As we compared these demonstrations with check farmer's field plot, SML 832 and SML 668 recorded 14.9 and 22.6% higher grain yield respectively, over the check. Summer moong variety SML 832 gave more yield after potato crop (9.8 q/ha) followed after mustard (7.1 q/ha) and lower after wheat (6.5 q/ha). Also, SML 668 recorded higher grain yield after potato crop (9.4 q/ha) from wheat and mustard crops. In SML 832 Technology gap and extension gap was 3.4 q/ha and 1.1 q/ha, respectively. Whereas, in SML 668 variety Technology gap and extension gap was 5.1 q/ha and 1.4 q/ha. The technology index was 29.57% in SML 832 and 44.9% in SML 668. The demonstrated technology gave higher net return of Rs 20900/ha, 16250/ha in SML 832 and SML 668, respectively over the check plots Rs 14460/ha and 10890/ha. Net returns were higher due to higher grain yield obtained with demonstration. Similarly both of these varieties gave higher B: C ratio over the farmers fields. As there is lot of technological gaps in adoption of pulse technologies. The Pulses grain yield could be increased by demonstrating different cultivation practices at farmer's field. Among three previous crops, summer moong sown after potato had more productivity than sown after wheat and Mustard crop. Among two mungbean varieties, SML 832 performs better than SML 668 in Muktsar District of Punjab.