Farmers typically dispose of old seedling nursery bags made of agricultural plastic films through recycling, composting, or disposal in designated waste facilities. Recycling is a common practice where the plastic is collected and processed into new products. Composting is less common for these materials due to their non-biodegradable nature, but some farmers may use them as a soil cover in certain conditions. Proper disposal involves collecting the bags and taking them to facilities that handle agricultural waste, ensuring they do not contribute to environmental pollution. It's important for farmers to follow local regulations regarding the disposal of agricultural plastics to minimize environmental impact.