Farmers protect their crops from UV radiation using agricultural plastics in several ways. They often use UV-stabilized plastic films in greenhouses and row covers. These films are designed to filter out harmful UV rays while still allowing other wavelengths of light necessary for photosynthesis to pass through. Additionally, farmers may apply UV-absorbing additives to plastic mulches, which can help to reduce the impact of UV radiation on the soil and plants. By managing the UV exposure, farmers can reduce crop damage, enhance growth conditions, and improve overall yield and quality.