Indian mustard (Brassica juncea L.) is a preeminent winter oilseed crop crucial to the global edible oil economy, historically reliant on intensive chemical fertilization to maximize seed and oil yields. However, prolonged dependency on synthetic NPK (Nitrogen, Phosphorus, and Potassium) fertilizers has precipitated severe secondary consequences, including the depletion of soil organic carbon (SOC), microflora collapse, and subsequent yield stagnation. This paper evaluates the agronomic, physiological, and economic impacts of integrating diverse organic preparations-ranging from bulky organic manures (Farm Yard Manure, Vermicompost) to microbial biofertilizers (Azotobacter, Phosphate Solubilizing Bacteria) and liquid bio-stimulants (Jeevamrit, Vermiwash, Panchagavya)-into mustard cultivation. A review of randomized block design field experiments demonstrates that an exclusively chemical approach degrades long-term soil health, while a purely organic approach often sustains a short-term yield penalty due to the slow mineralization of essential nutrients. Consequently, the Integrated Nutrient Management (INM) framework emerges as the most viable agronomic strategy. Substituting 25% to 50% of the Recommended Dose of Fertilizers (RDF) with high-quality organic sources, augmented with biofertilizer seed priming or soil inoculation, significantly optimizes vegetative growth parameters such as plant height and primary/secondary branching. Furthermore, liquid organic foliar applications during critical phenological stages (branching and flowering) delay leaf senescence and enhance the grain-filling period. This synergistic approach not only maximizes final seed yield and oil content largely by replenishing vital secondary nutrients like Sulphur but also yields the highest Benefit: Cost (B:C) ratio. Ultimately, the strategic application of organic preparations is not merely an alternative farming method, but a scientifically imperative intervention to restore rhizosphere health, ensure climate resilience, and sustain the long-term productivity of mustard cultivation.