The increasing need for sustainable agriculture, combined with the environmental costs of traditional farming, has accelerated interest in green nanotechnology. Agricultural waste valorization offers a circular and environmentally friendly approach to boost agricultural output while lowering environmental effects. Residues rich in cellulose and lignin, such as rice husk, banana peel, sugarcane bagasse, and corn cob, provide ideal substrates for the synthesis of nanoparticles. Compared to traditional techniques, the use of phytochemicals and microbial agents enables the creation of energy‐efficient, nontoxic nanoparticles. Nanomaterials created from agri‐waste have shown several roles in precision agriculture and soil conditioning. Water purification, controlled release of agrochemicals, and seed nano‐priming were studied in terms of their mechanisms and effectiveness from plant‐, bacterial‐, fungal‐, and algal‐mediated synthesis paths. Compared to chemically produced equivalents, these bio‐derived nanomaterials showed greater biocompatibility, better functional performance, and lower ecological risks. Innovations, such as stimuli‐responsive delivery systems, nano‐enabled biopolymers, and biosensors, show how they might help to promote smart agriculture. Recent advancements in nanomaterials derived from agricultural waste are consolidated in this review. It synthesizes and critically assesses their uses and capacity to enable sustainable agro‐environmental solutions. Furthermore, it underlines the continuing obstacles in scalability, regulatory systems, and public acceptance, therefore motivating more interdisciplinary studies in this area.
Barik et al. (Thu,) studied this question.