Agricultural runoff poses a significant threat to stone sculptures, as it often contains harmful chemicals, fertilizers, and sediments that can erode or stain the surface. To safeguard these artworks, consider the following effective strategies:

1. Physical Barriers: Install raised platforms or drainage systems around sculptures to divert runoff. Use gravel trenches or berms to absorb and filter water before it reaches the stone.

2. Protective Coatings: Apply chemical-resistant sealants or waxes to create a waterproof layer. Choose eco-friendly options like silicone-based coatings to minimize environmental impact.

3. Vegetative Buffers: Plant grass, shrubs, or trees uphill from sculptures to slow and filter runoff naturally. Deep-rooted plants like vetiver grass are particularly effective.

4. Regular Maintenance: Clean sculptures frequently with pH-neutral solutions to remove residue. Inspect for cracks or discoloration and address issues promptly.

5. Elevated Placement: Position sculptures on pedestals or elevated bases to avoid direct contact with contaminated water.

By combining these methods, you can significantly reduce the damage caused by agricultural runoff and preserve stone sculptures for future generations.