The article discusses how general purpose tractors can use less energy when working on farms by adapting to different tasks. The researchers found that adjusting the tractor's energy use based on the type of crops being grown can be effective. They also developed a method to match the tractor's energy consumption with the energy needed for the crops. By optimizing the farming process and considering factors like weather and soil quality, the researchers were able to evaluate how well the tractors performed during harvesting corn and spring wheat.