Coulter Mounted Knives

Positive Placement For Liquid Fertilizer

Liquid Injection Coulter Knives on BLU-JET Liquid Applicators are the optimum choice for those wanting minimal surface disturbance while still running a knife in the soil. The minimum disturbance knives inject fertilizer up to 4" beneath the soil surface and leave little ground disturbance when compared to a traditional shank and knife combination. Like the JetStream high pressure injection system, this combination provides greater accuracy for fertilizer placement when compared to surface fertilizer applications.

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Operation

In normal operation, the coulter mounted knife is set as close to the coulter blade as possible without inhibiting blade rotation or running at a greater depth. This allows the blade on the spring loaded coulter to protect the knife from field obstructions and keeps residue from building between the coulter and the knife. This also protects the thin ⅜" knife from excessive wear and minimizes soil disturbance. Fertilizer is delivered to the bottom of the knife through a tube welded on the back. Accurate depth is achieved through a proper knife setting in relation to the depth at which the coulter is set.

Adjustability

BLU-JET Coulter Mounted Knives are highly adjustable and can be set to achieve varying degrees of depth. Additionally, as the coulter blade wears, the knife can be repositioned so the distance between the blade and knife remains consistent.

Liquid Injection Only

The Coulter Mounted knives are intended for use with liquid fertilizer solutions only. The knives do not create enough disturbance, and run too shallow, to ensure proper absorption of NH3 into the soil. Dry and manure fertilizer solutions should also be avoided as the system is not designed to accept larger tubes than the standard ⅜" tube on the standard ⅜" knife. Unlike NH3, Dry, and Manure fertilizer solutions, where more soil disturbance is required to maximize absorption, fertilizer in a liquid solution can be injected and absorbed using lower soil disturbance methods.