Liquid fertilizer injection system

A liquid fertilizer injection apparatus adapted to be connected to and towed by a propulsion vehicle for applying liquid fertilizer under pressure from a source carried by the vehicle to a furrow formed in the ground comprising:

• a coulter blade assembly, including a coulter supporting bracket, a coulter blade mounted to said bracket for rotation about a central horizontal axis to form said furrow;
• a tow arm having a forward end and a rearward end, said forward end adapted for connection to the tractor;
• means on the rearward end of the tow arm for supporting the coulter blade assembly for rotation about a vertical axis, said means including a clamp mounted to the rearward end of the tow arm and a post mounted to said clamp;
• said coulter supporting bracket being mounted to said post and including a first support arm extending from said bracket for supporting said coulter blade for rotation about said central horizontal axis;
• a bracket having a slot for adjustably positioning the height of a liquid fertilizer injection nozzle;
• said slotted bracket being mounted to said first support arm means for connecting said liquid fertilizer injection nozzle to the source of liquid fertilizer under pressure;
• a second support arm, said second support arm having a first end, a second end and an intermediate section, said first end of said second support arm being pivotally connected to said first support arm, said nozzle being mounted to said second end of said second support arm;
• and first means on the intermediate section of said second support arm positionable in said slot of the slotted bracket for adjustably positioning the height of said nozzle.