Internaonal Journal of Environment, Agriculture and Biotechnology Vol-9, Issue-2; Mar-Apr, 2024 Peer-Reviewed Internaonal Journal Journal Home Page Available: hps://ijeab.com/ Journal DOI: 10.22161/ijeab ISSN: 2456-1878 (Int. J. Environ. Agric. Biotech.) hps://dx.doi.org/10.22161/ijeab.92.18 159 Impact of added Phosphorus and Phosphorus Solubilizing Bacteria in Yield and Yield Attributes of Mungbean (Vigna Radiata L.) Rekha Pandey, Dikshya Pandey, Chetana Bashyal, Janma Jaya Gairhe * Institute of Agriculture and Animal Science ( IAAS), Paklihawa Campus, Bhairahawa, Rupandehi, Nepal *Corresponding author: Rekha Pandey (pandeyrekha752@gmail.com) Received: 09 Feb 2024; Received in revised form: 22 Mar 2024; Accepted: 02 Apr 2024; Available online: 09 Apr 2024 ©2024 The Author(s). Published by Infogain Publication. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/). Abstract— Mungbean is an excellent rotational legume crop for farmers with small land holdings. Phosphorus Solubilizing Bacteria (PSB) solubilizes phosphorus to make it available to the plant so, their integration can be a supporting factor to increase its yield and enhance soil fertility. A field experiment was conducted at the Agronomy Research Farm of the Institute of Agriculture and Animal Sciences (IAAS), Paklihawa Campus, Rupandehi during the summer season of 2023. The experiment comprised seven treatments, namely T1: Control, T2: 10 kg P2O5ha-1 , T3: 15 kg P2O5ha-1 , T4: 20 kg P2O5ha-1 , T5: 10 kg P2O5ha-1 + PSB, T6: 15 kg P2O5ha-1 + PSB, T7: 20 kg P2O5ha-1 + PSB tested in Randomized Block Design and replicated three times. Pratigya variety of Mungbean was used. The soil of the experimental field was medium in organic matter, nitrogen, phosphorus, and potassium before the experiment. The analysis was done in R studio software. Results revealed that all the growth and yield attributes increased significantly (p < .05) under the integrated treatment (20 kg P2O5ha-1 + PSB). The growth characters viz., plant height (61.65 ± 1.25 cm), nodule number (23.90 ± 2.22), dry matter accumulation(30.74± 1.37 g), and yield attributes like the number of pod plant-1 (26.6± 1.00), pod length (8.24 cm ± 0.05), the number of grains pod-1 (8.84 ± 0.08), biological yield (30.2 ± 0.79 mt/ha), seed yield (2.44 ± 0.05 mt/ha ) and harvest index (7.51 ± 0.18 %) increased significantly in T7 (20 kg P2O5 ha-1 PSB). Keywords— Mungbean, Phosphorus, Phosphorus Solubilizing Bacteria (PSB), Nodules, Yield I. INTRODUCTION Mung bean (Vigna radiata), popularly known as green gram belongs to the family Fabaceae and has been consumed as a common traditional food for more than 3500 years across the world. Kole, C. (2007). Mung bean is an excellent rotation crop for smallholder farmers because of its short crop duration, tolerance to heat, minimal input requirement, and strong global demand. It provides its users with a triple benefit: more money, more nutrient-rich food, and more fertile soil (Nair et al., 2020). The crop responds favorably to the application of fertilizer phosphorus. It is the second most crucial macronutrient needed by plants after nitrogen. The characteristics of phosphorus nutrition include root development, stalk, and stem strength, flower and seed formation, crop maturity and production, N-fixation in legumes, crop quality, and resistance to plant diseases. Although microbial inoculants have been used to increase soil fertility over the past century, P solubilization research has been reported on much less frequently than nitrogen fixation (Jilani et al., n.d.) By providing assimilates to the roots, phosphorus not only plays a crucial function in root growth and proliferation but also enhances nodulation and N fixation (Kumar & Yadav, 2018). By increasing the soil microbial biomass and reducing the ineffective nodules, phosphate-solubilizing bacteria (PSB) like Pseudomonas striata and Bacillus polymyxa showed that mung bean growth and productivity had been positive, offering a biotechnological solution for sustainable agriculture(Hassan et al., 2017). PSB inoculation increases