Yes, farmers can use agricultural plastics to reduce energy usage in their irrigation systems. By employing plastic mulches or drip irrigation systems with plastic tubing, they can minimize water evaporation and ensure more precise water delivery, which can lead to significant energy savings. Plastic mulches can also help retain soil moisture and warmth, reducing the need for additional heating or watering. Additionally, plastic greenhouses can create a controlled environment that conserves energy by retaining heat, thus reducing the need for artificial heating.