What should you do with open bags of dry materials to prevent moisture absorption?

Sealing open bags of dry materials in plastic bags effectively prevents moisture absorption, which is crucial for maintaining the integrity and effectiveness of the contents. Dry materials, such as fertilizers or pesticides, can clump or degrade if they absorb moisture, leading to reduced efficacy and potential spoilage.

By sealing them in plastic bags, you create an airtight barrier that prevents humidity and moisture from entering. This helps retain the quality and extends the shelf life of the materials. Other methods, such as leaving them open or storing them in the original packaging, do not provide adequate protection against moisture. Using a refrigerator may not be suitable either, as it can introduce condensation when the temperature fluctuates. Hence, sealing in plastic bags is the most effective method for preventing moisture problems.