Leached ore is removed by bucket wheel excavator followed by secondary leaching. The nitrogen fertilizers cause toxic chemical leaching and runoff that enters our water tables. Waste can be transmitted to groundwater through the leaching of pollutants. Binders can be added to contaminated soil to prevent chemical leaching. It also affects soil moisture, which slows microbial growth and reduces leaching. This practice prevents soil exposure to atmospheric oxygen, leaching, and erosion. Heavy rainfall results in leaching out all soluble material of top layer of soil. Furthermore, fertilizers are lost by evaporation or leaching. The sulfuric acid is regenerated and recycled to the leaching step. Water is central to the dissolution, precipitation and leaching of minerals from the soil profile. The soils consist of rapidly leaching grus. A common example is the leaching out of nitrogen compounds from fertilized agricultural lands. Urine is typically present, although some is lost via leaching and evaporation. Dicamba is mobile in most soils and significant leaching is possible. This can lead to pollution and nutrient leaching.