Effect of levels of phosphorus and varieties on growth and yield of black gram Vigna mungo (L.) Hepper

A field experiment entitled “Effect of levels of phosphorus on growth and yield of black gram Vigna mungo (L.) Hepper” was conducted in Agronomy research farm in School of Agricultural Sciences (SAS), Nagaland University, Medziphema, during kharif season of 2022. The experiment consisted of twelve treatments which were laid out in Randomized Block Design (RBD) with three replications. The treatment consisted of four different levels of phosphorus (P) viz., 0 (P0), 20 (P1), 40 (P2) and 60 kg P2O5 ha-1 (P3) and three different varieties (V) viz., SBC-40 (V1), SBC-51 (V2) and PU-31 (V3). The results revealed that among different levels of phosphorus, application of 60 kg P2O5 ha-1 recorded higher growth attributes, yield attributes and nutrient uptake. In case of varieties, SBC-51 variety recorded higher growth attributes, yield attributes and nutrient uptake compared to the other varieties. In case of interaction between varieties and phosphorus, variety SBC-51 along with the application of 60 kg P2O5 ha-1 recorded the maximum growth attributes and yield attributes viz., number of pods plant-1 (37.24), pod length, number of seeds pod-1 (6.93), seed yield (1014.66 kg ha-1 ), stover yield (2246.54 kg ha-1 ) over rest of the treatment. In terms of nutrient uptake, application of 60 kg P2O5 ha-1 in SBC-51 variety of black gram recorded highest N, P and K uptake by both seed and stover.