<p>Sustainable agricultural intensification requires materials that can optimize nutrient-use efficiency, enhancing crop establishment, managing water availability, and enabling real-time environmental monitoring. In this context, nanocellulose-based systems have proven to be promising tools for achieving these goals. Until now, most agricultural applications have relied on plant-derived cellulose nanocrystals (CNCs) and cellulose nanofibers (CNFs), which differ structurally and functionally from bacterial nanocellulose (BNC). However, the potential of BNC, a highly pure, biologically produced nanofibrillar hydrogel with a uniform structure, has yet to be fully explored. This review synthesizes recent advances in the use of BNC across four emerging agricultural domains: controlled-release nanocarriers, seed-coating technologies, biosensing platforms, and water-retention hydrogels. BNC's interconnected nanofibrillar network, high porosity, exceptional water retention capacity, and adjustable surface chemistry may provide functional advantages in specific agricultural applications compared with plant-derived nanocellulose. These characteristics support promising results in areas such as nutrient delivery, drought resistance, seedling vigor, pesticide detection, and environmental monitoring. However, even with these advances, significant gaps in research remain. Despite recent advances, agricultural studies involving BNC remain limited in number and scope, with very few investigations extending beyond laboratory or greenhouse conditions to field-scale validation. Challenges related to cost, production scale-up, and long-term environmental interactions further constrain broader adoption. Future progress will require advances in fermentation engineering, the development of cost-effective substrates, systematic agronomic trials, and the integration of BNC with complementary biomaterials and sensing technologies. Collectively, the emerging evidence indicates that BNC holds significant potential as a multifunctional platform for precision and sustainable agriculture, but translating this promise into practical application will depend on addressing critical gaps in production, performance, and field deployment. Future research should focus on techno-economic improvements, hybrid materials, and the integration of BNC into precision agriculture. This review outlines both the current advances and the challenges that must be overcome for BNC to become a key biomaterial in sustainable and climate-resilient agriculture.</p>