Biodiesel blending, particularly at the B20 level (20 percent biodiesel blended with 80 percent conventional diesel), plays a significant role in the management of renewable energy in agriculture. Agriculture is both an energy-intensive and fuel-dependent sector, relying heavily on diesel for operating tractors, irrigation pumps, harvesters, threshers, and transportation vehicles. The adoption of biodiesel blends such as B20 offers a pathway toward enhancing energy security, promoting sustainable farming practices, reducing greenhouse gas emissions, and supporting rural economies through the utilization of locally available feedstocks such as non-edible oilseeds, waste cooking oil, and animal fats. As part of renewable energy management strategies in agriculture, biodiesel blending integrates environmental responsibility with economic and operational considerations. The importance of B20 blending in agriculture stems from multiple interrelated factors. First, it reduces dependence on imported fossil fuels. Many countries rely on diesel imports to meet agricultural energy demands. By blending biodiesel derived from domestic feedstocks, governments and farmers can reduce foreign exchange expenditure and enhance national energy security. Second, biodiesel production can stimulate rural development. Oilseed crops such as jatropha, pongamia, and mustard can be cultivated on marginal lands, providing additional income sources for farmers without competing directly with food crops. The integration of biodiesel production within agricultural systems supports circular economy principles, where agricultural residues and by-products are converted into energy inputs for farming operations. Third, biodiesel blending aligns with climate change mitigation goals. The carbon dioxide released during biodiesel combustion is partially offset by the carbon absorbed by the feedstock crops during photosynthesis. As a result, B20 blends can significantly lower lifecycle greenhouse gas emissions compared to pure petroleum diesel.