Nutrient recovery and enrichment of soils have key significance to sustainable agriculture and the management of an ecosystem. In the third current chapter, there is consideration of three integral components that concern resource recycling, including recovery of nutrients from biodegradable waste, production of biofertilizers and their utilization as amendments, and circular management of nutrients. Biodegradable wastes containing much nitrogen, phosphorus, potassium, and organic matter are some precious resources recovered by composting, aerobic digestion, or biochar production. These nutrient-rich byproducts make the soil fertile and do not contribute to environmental pollution. Biofertilizers and soil amendments, such as nitrogen-fixing bacteria, phosphate-solubilizing fungi, and mycorrhizal inoculants, play an important role in making agriculture sustainable by increasing the nutrient availability and health of soils. These microbial products decrease dependency on synthetic fertilizers, thereby promoting biodiversity. Third, it focuses on circular nutrient management or closed-loop nutrient cycles in the agroecosystems, optimizing nutrient retention as well as minimizing losses. These practices, including the addition of crop residues and organic matter, enhance soil fertility, improve food security, and increase ecosystem resilience. These sustainable practices overcome the challenges of soil degradation, nutrient depletion, and pollution, hence building a resource-efficient agricultural system. This chapter focuses on nutrient recycling as one of the critical strategies for reducing agricultural impacts on the environment while enhancing food security. It will, however, require a collaborative and integrated approach for nutrient recovery and soil enrichment to take future generations toward resilient and productive agroecosystems.