Influence of phosphorus and biofertilizers on symbiotic parameters, productivity and profitability of soybean (Glycine max)

A field study was carried out during the rainy (kharif) season of 2019 at Regional Research Station, Punjab Agricultural University, Ludhiana and Faridkot, Punjab, to effect phosphorus levels biofertilizers on symbiotic parameters, productivity, profitability soybean [Glycine max (L.) Merr.]. The experiment comprised 4 (0, 17, 26 35 kg P/ha) biofertilizer treatments [uninoculated control, Bradyrhizobium, Phosphate-solubilizing bacteria (PSB) Bradyrhizobium + PSB]. Total 16 treatment combinations were laid in a factorial randomized complete-block design, replicated 3 times. Application P/ha recorded highest growth yield attributes seed 2 1.84 t/ha respectively, which significantly higher than control 17 but statistically par with both locations. However, production efficiency (14.62 13.50 kg/ ha/day respectively) application P/ha, being P/ha. monetary (302 277 `/ha/day obtained Ludhiana, while Faridkot. Inoculation PSB sole inoculation each other proved superior uninoculated for attributes, efficiency.