Shallow Drains Tool
Use the outputs from the Drain Spacing Tool to estimate the nitrate load reduction with shallow drains.

Ask your state conservationists or NRCS engineer about the average annual nitrate-N concentration in your region.

This is the benefit of reducing N loss and it is equal to the cost of removing N in a municipal water treatment plant. This cost varies from about $4/lb to $45/lb, depending on N concentration and level of treatment.