Side dressing fertilizer coulter

An agricultural side dressing fertilizer coulter row unit for use with a towing frame hitched to a tractor, said row unit comprising:

• a first attachment member adapted to be rigidly connected to said towing frame;
• a second attachment member pivotably coupled to said first attachment member for pivoting movement about a substantially vertical axis;
• a parallel linkage pivotably coupled to said second attachment member for pivoting movement of a trailing end of said parallel linkage relative to said second attachment member;
• a tool-carrying stem pivotably coupled to said trailing end of said parallel linkage;
• a coulter wheel rotatably mounted on said stem for forming a slit in the soil;
• a liquid fertilizer dispenser mounted on said stem for dispensing fertilizer into said slit;
• a closing wheel rotatably mounted on said stem;
• and
• a biasing element pivotably attached to said parallel linkage and coupled to said second attachment member for urging said stem downwardly with a controllable force.

A row unit for use with a towing frame, said row unit comprising:

• a first attachment plate adapted to be rigidly connected to said towing frame, said first attachment plate having a rear side with a pair of bosses, each of said bosses having a mounting through hole;
• a second attachment plate having a front side with a cylinder, said cylinder having a mounting through hole;
• a shaft inserted vertically through the mounting through holes of said bosses and said cylinder for pivotably mounting said first attachment plate and said second attachment plate about a substantially vertical axis;
• a parallel linkage pivotably coupled to said second attachment plate for pivoting movement of a trailing end of said parallel linkage relative to said second attachment plate;
• a tool-carrying stem pivotably coupled to said trailing end of said parallel linkage;
• a coulter wheel rotatably mounted on said stem for forming a slit in the soil;
• a liquid fertilizer dispenser mounted on said stem for dispensing fertilizer into said slit;
• a closing wheel rotatably mounted on said stem;
• and
• a biasing element pivotably attached to said parallel linkage and coupled to said second attachment plate for urging said stem downwardly with a controllable force.