Agricultural plastic films are used to enhance crop growth and yield. The main types include: 1. Mulch Films: These are used to cover the soil surface to retain moisture, suppress weeds, and regulate soil temperature. 2. Greenhouse Films: These are transparent and used to construct greenhouses, providing a controlled environment for crops. 3. Silage Films: These are used for the fermentation of grass and other crops to create silage, a feed for livestock. 4. Tunnel Films: Used to create low-cost, temporary structures for protecting crops from harsh weather. 5. Seedling Films: These are used to cover seedbeds to maintain optimal temperature and humidity for seed germination. Each type of film is chosen based on the specific needs of the crop and the environmental conditions.