June 27, the United States Minnesota Department of Agriculture (MDA) official website shows that the Minnesota Department of Agriculture will be the nitrogen fertilizer bill for public hearings hearing from the original five games increased to seven games. All opinions must be in written form and can be communicated through hearings, MDA official website and mail. Public consultation date as of August 11. The N Fertilizer Regulations aim to minimize the possibility of nitrate nitrogen in groundwater and drinking water in the state by controlling the use of nitrogen fertilizer in Minnesota. MDA is expected to pass the regulations in the fall of next year. By then, Minnesota will be the first legislation to limit the application of nitrogen in the US state.

It is understood that nitrates are the most common pollutants in Minnesota groundwater. Excessive nitrate in drinking water can cause serious human health problems. The Minnesota Department of Health (MDH) sets a 10 mg / liter standard for drinking water nitrate levels. Private wells should be used as a safety guide.

The Ordinance is divided into two parts. The first part requires the application of nitrogen fertilizer in autumn or permafrost according to the distribution of groundwater fragile areas. The groundwater fragility zone refers to bedrock and karst geology in the near-surface soil saturated water conductivity of more than 1.42 inches per hour. If more than 50% of the area is a groundwater fragile area, nitrogen fertilizer will be banned in the fall and permafrost of the area. If a region of the groundwater fragile area does not exceed 50%, nitrogen fertilizer in the fall and frozen soil will be limited application. In the second part, four kinds of methods to reduce the nitrate content of groundwater are proposed.