Agro-wastes such as rice straws, husks, and hulls are valuable resources in day-to-day life. Recently, rice wastes have gained attention, especially in scientific fields, due to their properties such as soil amendments, biochar, heavy metal remediation, fertilizers, and surface-modified adsorbents. Scientists are exploring the properties of rice husks for various uses, which could transform this waste into a valuable material soon. Properties like surface area and pore space are opening new avenues for solving nutrient delivery challenges, enhancing rice husk applications, and reducing waste management risks through surface modification techniques. These porous materials are formed by different carbon bonds between plant cells and functional organic ligands. Their advantages include crystalline ordered structures, high surface area, high porosity, surface modification, and pore channels. Recently, rice husk-based materials have also been used as carriers for the slow release of fertilizers and microbiomes in agriculture.