The sustainable agricultural system involves the integration of trees, crops, and livestock on the same land, allowing for multiple benefits. Agroforestry can help resolve the problem by acting as a natural filter for the excess nitrogen. The trees in such a system absorb nitrogen through their roots and incorporate it into their biomass, preventing it from leaching into the soil or water. The trees also provide shade for crops, reducing their water and nutrient requirements, which in turn reduces the amount of fertilizer needed. Additionally, the roots of the trees can improve soil structure, which can reduce soil erosion and improve water infiltration. Another solution is agroecology, which involves crop rotation, intercropping, and the use of natural fertilizers. One of the main causes of nitrogen pollution in the Netherlands is the heavy use of chemical fertilizers in agriculture. Agroecology offers an alternative approach that reduces the reliance on chemical fertilizers by utilizing natural sources of nutrients, such as compost and animal manure. This can significantly reduce the amount of nitrogen runoff from farms, which is a major contributor to water pollution. https://www.activistpost.com/2023/03/dutch-farmers-and-government-can-reach-a-better-solution.html