About my sewers Sewer connections Wastewater treatment Sewer use by-law Stormwater pollution Community Offices Water Efficiency Beaches Basement flooding Household hazardous waste Resources Department Title will go here. They contain large amounts of nitrogen and phosphorus required for crop growth and small quantities of potassium and other essential micronutrients such as iron, zinc, copper, boron, molybdenum and cobalt.
Plants require nutrients for growth.
In nature, plants obtain nutrients from the soil and return them to the land when the plant dies and decays. This natural cycle is interrupted when agricultural harvesting removes part or all of the plant from the land. Farmers must replace nutrients in their soils by applying a nutrient-rich product such as a commercial fertilizer or biosolids. Using biosolids as a nutrient source allows farmers to reduce their use of chemical fertilizers. For this reason, farmers are made aware of the concentrations of nutrients contained in the biosolids.