Yes, there are several alternative materials for seedling nursery bags in agriculture. These include biodegradable plastics such as polylactic acid (PLA), which are derived from renewable resources like corn starch. Other options are coconut coir pots, which are eco-friendly and can be composted, and paper pots that are made from recycled paper and are also compostable. Additionally, some farmers use peat pots made from compressed peat moss, which are both biodegradable and provide a good growing medium. These alternatives are gaining popularity due to their environmental benefits and the reduced need for transplanting, which can lead to less root disturbance and improved plant survival rates.