The Rice Bean (RB) (Vigna umbellata L.), which is native to South and Southeast Asia, is an annual underutilized grain legume crop that belongs to the family Fabaceae. It has a higher nutritional quality compared to many other legumes within the Vigna family. Yet, there is a lack of understanding of the impact of plant nutrients on the diverse attributes of RBs. Therefore, the research aims to examine the effect of diverse levels of Phosphorus (P) along with Sulphur (S) on the yield, Nutrient Uptake (NU), and nutrient use indices of RB crops. During the Kharif seasons of 2017-18 and 2018-19, a field experiment is conducted at an agricultural research farm in West Bengal. A total of 3 diverse levels of P and S are tested with Factorial Randomized Block Design (FRBD) (3×3+1 factorial). As per the outcome, an application of 30kg/ha S along with 80kg/ha P has recorded higher yield, nutrient content and uptake, and nutrient use indices of RB crop.