How Farm Plastics Harm Soil and the Environment

The use of agricultural plastics—particularly plastic films such as mulch and greenhouse
covers—has become widespread in modern farming due to their role in improving water
retention, temperature control, and weed suppression. However, these plastics pose
significant environmental challenges when it comes to disposal and degradation.
Agricultural plastics are difficult to recycle due to contamination from pesticides, fertilizers,
soil particles, plant debris, moisture, and chemical additives. Contamination levels can reach 40–50% by weight, making processing economically and technically unfeasible in many cases. Collection is also difficult in rural areas, leading to frequent abandonment, burial, or open burning of plastic waste.

These disposal practices have serious environmental implications. Burned plastics release
harmful gases, while buried or discarded plastics can degrade soil structure and reduce soil
organic matter. Over time, ultraviolet (UV) exposure and mechanical wear cause these
plastics to break down into microplastics, which can enter waterways through precipitation
runoff or tidal washing.

Microplastics pose additional risks. They can absorb toxic chemicals and carry them throughsoil and aquatic systems, eventually entering the food chain. Additives in agricultural plastics—such as UV and thermal stabilizers—can further disrupt soil health by affecting nutrient cycling, increasing salinity, and making soil water-repellent. The long-term
accumulation of microplastics may hinder crop growth and contribute to greenhouse gas
emissions. Understanding the full impact of agricultural plastics is essential for sustainable farming and environmental health.