Abstract: A fertilizer knife for applying fertilizer to soil. The fertilizer knife includes a knife body having a primary chamber through a rearward end thereof. Fins diverge laterally outwardly from a tip at a lower forward end of the knife body and curve upwardly from the lower forward end, terminating above a discharge end of the primary chamber. Liquid from a liquid source is communicated to the primary chamber and is discharged from the discharge end into the furrow formed by the fertilizer knife. In another embodiment, a secondary passage through the knife body communicates gas from a gas supply into a gap surrounding a supply tube disposed within the primary chamber. In another embodiment flow controllers disposed on the knife regulate liquid into the primary chamber and gas into the secondary passage.

Abstract: A fertilizer knife for applying fertilizer to soil. The fertilizer knife includes a knife body having a primary chamber through a rearward end thereof. Fins diverge laterally outwardly from a tip at a lower forward end of the knife body and curve upwardly from the lower forward end, terminating above a discharge end of the primary chamber. Liquid from a liquid source is communicated to the primary chamber and is discharged from the discharge end into the furrow formed by the fertilizer knife. In another embodiment, a secondary passage through the knife body communicates gas from a gas supply into a gap surrounding a supply tube disposed within the primary chamber. In another embodiment flow controllers disposed on the knife regulate liquid into the primary chamber and gas into the secondary passage.