Spreading waste materials including animal manures on farmland is an important way of adding nutrients to the soil. Because farm animals may be given feed supplements or medicines containing metals, these can become present in their manure. This can lead to metal build-up in the soil, and runoff into adjacent waterbodies.
Predicting the metal build-up and runoff can help in:
- Making decisions on how to spread manure sustainably;
- Providing data for environmental impact assessment.