Biochar, a solid carbon material formed through the thermochemical conversion of biomass, has become a viable instrument for carbon sequestration, soil improvement, and sustainable farming. This chapter critically overviews biochar production techniques, highlighting methods such as pyrolysis, gasification, and hydrothermal carbonization, and considers how variations in feedstock and process conditions influence the physicochemical properties of the resulting biochar. Its high porosity, extensive surface area, and variable carbon composition are fundamental to its effectiveness as a soil amendment. Empirical evidence presented in the chapter demonstrates that biochar addition can drastically alter soil structure by reducing bulk density, improving soil aggregation, and increasing water retention capacities. It also enhances chemical properties, such as cation exchange capacity, pH stabilization, and nutrient retention, which in turn support enhanced nutrient availability for plant growth. Biochar has been shown to neutralize soil acidity effectively and to promote the growth of beneficial microbial communities, fostering an environment that boosts overall soil health. Furthermore, the chapter explores biochar’s role in environmental remediation through its ability to immobilize heavy metals and adsorb pollutants; a promising strategy for managing contaminated soils. The development of biochar-based slow-release fertilizers, alongside its integration with precision agriculture methodologies, points to its future potential in reducing chemical fertilizer dependency and mitigating environmental impacts. To fully harness these benefits, the chapter recommends systematic future research to standardize production conditions and evaluate long-term agronomic impacts, thereby establishing biochar as a critical component in advanced agroecological management and sustainable land use planning.