Traditional agricultural knowledge, rooted in centuries of observation and practice, offers valuable insights into sustainable land use, resource management, and biodiversity conservation. This study investigates the integration of traditional knowledge systems with modern agricultural technologies to promote sustainable rural development. Using a multidisciplinary approach, the research draws on case studies from South Asia, Sub-Saharan Africa, and Latin America, where indigenous practices such as organic composting, crop rotation, and community seed banking are being effectively combined with scientific innovations like precision farming, improved irrigation systems, and climate-resilient crops. The findings reveal that such integration not only enhances food security and soil health but also strengthens local economies and preserves cultural heritage. However, challenges remain, including the erosion of indigenous knowledge, limited access to modern resources, and the need for policy support. The study concludes by recommending participatory frameworks that involve local farmers in decision-making, government incentives for eco-friendly practices, and cross-sector collaboration to bridge the gap between tradition and technology for holistic and sustainable rural development.