Vol. 9, Special Issue 10, Part K (2025)

The present field experiment was carried out during the rabi season of 2024-2025 (November to March) at the Crop Research Farm, Department of Agronomy, Naini Agricultural Institute, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj. The primary objective of the study was to evaluate the effect of biofertilizers and phosphorus levels on the growth and yield performance of greengram (Vigna radiata L.), using the variety SAMRAT PDM-139.
The experiment comprised three levels of phosphorus application (30, 40, and 50 kg P₂O₅/ha) and three types of biofertilizers (Rhizobium, PSB, and VAM), each applied at 20 g/kg of seed. The treatments were arranged in a two-factor Randomized Block Design (RBD) with three replications.
The findings revealed significant differences among treatments for most growth and yield parameters. Application of 50 kg P₂O₅/ha produced the tallest plants, as well as the highest number of pods per plant, seeds per pod, and 1000-seed weight, compared to lower phosphorus levels. Among the biofertilizers, Rhizobium inoculation resulted in the highest seed yield (16.91 t/ha), along with maximum stover yield, biological yield, and harvest index. Conversely, treatments with only Rhizobium at 20 g/kg seed recorded the lowest values for most parameters.
The interaction between phosphorus levels and biofertilizers showed a significant effect on all growth and yield traits. The combination of 50 kg P₂O₅/ha with Rhizobium at 20 g/kg seed consistently produced superior results for all parameters, including seed yield, which peaked at 16.91 t/ha. The only exception was harvest index, which did not follow the same trend.