Agricultural plastic fertilizer bags can be categorized into several types based on their material, usage, and design. The main types include: 1. PE (Polyethylene) bags, which are the most common due to their durability and cost-effectiveness. 2. PP (Polypropylene) bags, known for their resistance to moisture and chemicals. 3. Multi-layer co-extruded bags, which combine different materials for enhanced strength and barrier properties. 4. UV-resistant bags, designed to protect the fertilizer from degradation under sunlight. 5. Recyclable or biodegradable bags, which are environmentally friendly options. 6. Valve bags, which allow for controlled pouring of fertilizers. Each type serves specific purposes and is chosen based on the fertilizer's properties and the handling requirements.