The objective of sustainable agricultural waste management practices is to replace traditional landfilling for agricultural waste disposal. Valorization, composting, and co-processing methods promise to escape the constraints of landfilling (i.e., soil salinity increment, heavy metal pollution, and greenhouse gas emissions), accelerating the generation of value-added products for applications in bioprocess and environmental engineering. Advances in valorization processes, including anaerobic digestion and biochar production, provide opportunities to convert agricultural waste materials into biogas and soil amendments. This opens up prospects to reduce the use of nonrenewable energy and chemical fertilizers. Engineering of biomaterials such as biodegradable bioplastics derived from mango kernels replaces the petroleum-based plastics and reduces fossil fuel dependency. Besides heap and in-vessel systems, microbial consortia can be implanted into composting methods to enable efficient waste degradation in terms of enhanced nutrient value of farm compost, reduced composting time, and methane emissions. As the long-standing effort to achieve the zero landfill goal ensures sustainable consumption and production patterns goals, it satisfies United Nations' Sustainable Development Goal 12. As these two goals evolve, their convergence becomes more apparent, underlining the growing need for shared knowledge and collaboration.