Microplastics in Agricultural Lands

Microplastics—plastic fragments smaller than 5 millimeters—are now recognized as an emerging contaminant in soils, waterways, and even the food system. Studies have shown that these particles can alter soil health, carry other pollutants, and threaten aquatic life once carried into streams and rivers. While much of the attention has focused on urban sources such as wastewater and stormwater, agricultural lands are increasingly identified as another important contributor.

What Are Microplastics—and Why Do They Matter on Farms?

Microplastics are plastic fragments, fibers, films, pellets, or foams smaller than 5 mm. In agriculture, plastics are indispensable for productivity. Plasticulture describes the integration of plastic materials into crop production systems to enhance crop growth and management. Common applications include plastic mulch films, drip irrigation lines, greenhouse coverings, and protective row covers. These practices help conserve soil moisture, suppress weeds, limit plant diseases, extend the growing season, and boost yields. But despite these benefits, their widespread use also poses challenges, such as the release of microplastics into soils and waterways through weathering and field operations.