The purpose of the injector is to test the concept developed by Derek Hunt and Shabtai Bittman at AAFC in Agassiz to use dairy slurry to replace the ‘starter’ commercial fertilizer typically used for corn. The injectors are set to corn-row space, and designed to deliver a constant rate of manure; the corn is planted as close as possible to the injection furrow a few days later by following the tire tracks. Our research has shown that dairy slurry placed close to corn roots will provide sufficient nutrients to fully replace commercial starter fertilizer. The farmer saves money and avoids overloading the soil with nutrients. Our technique has been adopted in northern Germany, confirmed by researchers in the Netherlands and undergoing evaluation in Denmark.